I believe everyone was wanting to see the wiring done one at a time and why when you're doing it. Then there was no test, but great idea. I like using compartments like that can or other throw away containers instead of making or buying one.
You NEED the third terminal of the pots connected to signal ground otherwise the voltage divider established by the pots won't work properly. Wired as shown you may find audio leaks through even when the pots are wound all the way down. With the ground connection in place, turning the pot all the way down shorts the 'wiper' terminal to ground, which ensure no audio can leak through.
Might have been easier using a step bit, they tend to be gentle. They will not grab and pull the tin up the bit. So you are using point to point rather than a PCB. That makes sense. JohnAudioTech built a nice little preamp in a plastic case. I am thinking of building something like these and looking for ideas, so thanks for the video.
Great little project, i plan to build one. One note - you could have put the pots on the bottom and jacks on the sides and the lid would then be the bottom and opening it would not need the flexibility and length of wires as nothing is mounted to the lid.
I would really like to hear it. See if there's any hum. wondering if there was a need for resistors, or capacitors, or logarithmic pots instead of linear.
Annak idején sztereo - mono jelközösítőt építettem két RCA bemenettel egy RCA kimenettel. A jelbemenetre egy 25K sztereo potmétert, a mono kimenetre egy 47K mono potmétert raktam. De fém doboz helyett müanyag dobozt használtam.
More likely, how NOT to make holes in a mint tin... My impression of his thin metal fabrication skills is that he should stick with thicker plastic since it is more forgiving...
Hello, Glen! Very good video, thanks! I want to build my own and simple mixer to mix up my PC sound card's sound and the C64 (old machine) sound. It's sound comes from RCA. Will it be the same task? I guess it's "yes" but who knows, maybe there are some nuances... Also it's interesting to see the scheme (yeah, I know it's simple :) ). One more (important) question: the box carries "ground". Is it safe to leave it non-isolated? Can it cause some shortcut with destroying some audio components that will be plugged into this mixer?
i suggest u draw some simple schematic of the wiring and add it to the description of the video. For many if not most people interested in making the project, this video is going to be relatively useless. Sure they will make the holes and try to figure out the wiring from reading the comments section and hoping they find someone with the information, But that's not easy for those with no experience with electronics. Some general specs would be nice too (what it can be and cannot be connected too), or else someone might connect this to an amp and fry it.
If I wanted to connect a phone and computer, while allowing to do phones calls what would need to be different. In other words, there would be an output from the computer to the mixer and an output from the phone to the mixer that would also receive voice audio. The output on the mixer would be able to do headphones with mic as well.
radio shack makes a phone voice recorder. it's an audio splitter that comes off of your handset into a headphone jack. they're $20.00 at most. you can probably find one on amazon.com. once you have that device, plug that into one channel of your board, then the computer stereo out into another channel. your mic unfortunately will need to be the handset of your phone, or the other person can't hear you. This board unfortunately is not advanced enough to pull off mix-minus capabilities, and route your mic back to a caller, without creating a hell of a loop.
Hello glen, i have some questions and it would be nice if you could help me. could you tell me where you got all your stuff from? A link would be nice. Is there a difference between the input and output audio jack? And is this stereo or mono? And if it is mono, is it a lot more to do it with stereo? Btw nice project
I'm getting the parts together for you. I purchased everything from ebay, using these search terms: Potentiometers 5 x 10K Ohm B10K 10KB Linear DUAL Taper Potentiometer Pot 17mm Shaft Knobs 10 Pcs 6mm Shaft Hole Dia Potentiometer Pot Knobs Caps WD I'm still working on the stereo headphone ports, I will get back to you and post it here. I need to make a schematic too, check back shortly.
+Robert S you want to look up "5 pin stereo 3.5mm or 1/8th inch headphone jack" on ebay. 5 pins are Ground, L -, L +, R -, R+. They may not be pinned that way directly, you may want to pipe some audio through them to confirm pinout before you start to solder. The stereo headphone Jacks i selected were long, not fat. I think fat might conflict for space too much. Working on wire diagram with my new Surface tablet. I will get back to you soon with a diagram.
I read somewhere that linear potentiometers don't work for mixing, but you have to get audio ones. Is this really true? Also with these same parts could you make four inputs too. I wonder if you have to buy a higher K resistors for more inputs?
At 6:36 you say rider. That is actually called a TANG. Since you will most likely won't be putting any force on the POT's. Use a pliers and snap it right off.
No, really! LINEAR (B10K) pots for an AUDIO application?? You should replace them AS SOON AS POSSIBLE with LOGARITHMIC ones (A10K). Because the human hear has a logarithmic response, you know... Other than this, there would be enough room for a fourth channel.
what's the difference with all those amps using linear? or those are 'converting' the pot changes to logarithmic values(at least seen that emulated on arduino)?
Hi, I would like to build one of these however I was wondering if you could post or send me a parts number list. (the audio pot meters & headphone jack parts you used &/or a circuit diagram with this on it. Thanks!
Mandalorian Mercy yes, I have been needing to put this list together for a while now. please subscribe, that will give you advance notice when I release the video for that. I just purchased some USB female inputs which I will be using to create a powered version of this same mixer. this will give me a 2watt amplifier that will hopefully counteract the 10percent volume drop at the resistor I have been experiencing. This will just be USB powered, not USB data.
Alright, so I subscribed. I like your stuff, just wish you'd show the circuitry part in more detail. Any chance a quick list of parts numbers could be compiled though? Perhaps posted in the video description. I've been scratching my head over how to wire the audio in jack - pot - (resistor) - audio out jack connections. I understand you have the grounds linked between the audio jacks (i think). How are you wiring the left and right audio to the same pot? I'd expect the pot 3 pins to be "left audio in, left audio out, ground". So I don't see how you can be using 1 pot per audio in ports. Can you clarify this for me?
Mandalorian Mercy I will get to this soon. I have to paint my condo today in preparation for renting it out. then I will open the mixer and get the information you need.
the pots are double tapered so there are 6 pins per pot. list below, sorry I'm putting this together trying juggle a crazy busy life right now. video and drawing to follow eventually. Parts list, all from ebay. except resistors from radioshack going out business sale. Knobs: 10 Pcs 6mm Shaft Hole Diameter Potentiometer Pot Knobs Caps Pots: 5 x 10K Ohm B10K 10KB Linear DUAL Taper Potentiometer Pot 17mm Shaft Jack: 3.5 mm Jack Panel Mount Female Stereo 1/8" Solder Terminal Audio Jack Resistors: 1k I think you need 6 but I need to open the box again and count.
Rahul Kapoor I am working on a new version that takes power from USB, this power is used to amplify the signal so there is no longer a drop in audio level. I will document the wiring for both then. I'm sorry for the delay on this, I have moved an prepping my old condo for a renter to move in. life has been very, very, busy.
+DRAWNBOX "if you gradually delay the audio going through the second channel, the peaks and troughs of the two audio waves shift out of alignment. Because of the unique properties of sine waves, the combination of the two channels will now still produce a sine wave of the same frequency, but its level will be lower than if the two channels were in phase, and we say that partial phase cancellation has occurred. When the second channel is delayed such that its peaks coincide exactly with the first channel's troughs (and vice versa), the two waveforms will combine to produce silence. At this point we say that the waveforms are completely 'out of phase' with each other and that total phase cancellation has occurred." The resistors prohibit the phase cancellation, in theory anyway.
sorry to wait so long to get back with you, but I had to look this up. My previous answer isn't exactly wrong, it just lacks all technical detail and an explanation of what is happening on an audio theory level. I'm not trying to come off like a sound pro here, a good audio engineer is worth their weight in gold. When it comes to this stuff I'm a tinkerer at best. I have wired studios for TV and Radio but I consider that more component installation over audio engineering. Thanks for watching my video. I'm going to be installing some tablets in my car with 5.1 digital surround sound. if interested please subscribe.
+julian preciado thanks for your question. As I understand it, the resistors have two functions. 1) to knock the audio level down a little so audio isn't coming in too hot. 2) to avoid mic cancellation or component cancellation when too feeds of similar audio are competing for the same channel. Our aim here is a mix and not abrupt cut, or the bass of one channel coming through more noticeably than the other. The resistors help facilitate that over a bare wire.
+ravis T, 1k or 1000 I go over this at about 12:15 (I may have said it too fast), this will result in slight drop in audio levels, up to 10%. I'm running my audio into a computer, so I can just boost the audio level in the computer up a little over unity, and it's no big deal. Depending on your application, you may want to add a small power amplifier circuit. I have not modes that in to this yet. I want to see if I can power one using USB, in the future. So many projects, so little time.
You butchered that lid, but great video, a pair of side cutters would trim the slithers left my the drill neater than a hammer. Also I think whoever showed you how to tin cables does not like you you heat the cable and bring the solder to the cable stabbing at it defeats the flow bond.
While it may not conform to your pronunciation, a pot DOES actually meter, a pot is a sliding or rotating contact that forms an adjustable voltage divider so at full open you get 100 percent and at full closed you get a diminished volume sometimes zero or off, other time 5 or 10 percent. So actually it does meter. I suppose percentage could be seen as potential so there you go mash them together. Say it any way that floats your boat, it's metered. Video is already produced not changing it now. Will on second video adding amplifier since you guys like "mitter" so much, thanks.
John Coops thanks John, I didn't mean to upset the gawds. I had no idea a finishing nail was so offensive, it did do a decent job, and the only punch I had that moment was really too wide, it does pay to have the right tool for the job, but sometimes improvising works, or screws up the project beyond any help, I'm glad it turned out OK.
You are making an instructional video. Show people the correct way to do things, and then by all means show them ways to improvise (I have no problem with that). But I just noticed your soldering technique and wire tinning instructions, and that is just hilariously wrong, so the holes are the least of your problems.
John Coops john, if you have a better model then by all means upload it. I have had no problems with my solder joints and the stereo pots have been working fine since installation. it's incredible to me how somebody such as yourself with zero posts is throwing rocks at somebody who is trying to pass a little bit of knowledge with a build that works and they enjoy so that others may have a similar experience. Good luck with your next project.
You obviously are an idiot. There are no stereo pots. It hasn't been working fine... THIS CANNOT WORK. Hint: all the inputs are short circuited. ROFL - what a troll. Show us a video of the unit working, go on.
John Coops John the wiring is not shorted. These are stereo pots and there are stereo inputs and one stereo output. Why are you relying on name calling when challenged? Is it because you would rather tear something or somebody else down under the ambiguity of the Internet instead of taking the initiative with your know it all attitude and creating a video of your own? I find it interesting that you are calling into question my credibility (the troll comment) when you don't have a single video posted to your account. You contribute nothing but are willing grade others work so readily, and you post so frequently it is really peculiar behavior. I don't do this to make money, or look for fame, I post these little videos to help people and show what worked for me, also a record for me to look back on how I did something. If you don't like me, or my video please don't make the project. it's that simple. please feel free to keep commenting however, everytime you do, the video earns another view which pushes this "idiot" video (as seen from your eyes) over other legitimate how to videos, something you should be proud of, so please keep commenting.
I believe everyone was wanting to see the wiring done one at a time and why when you're doing it. Then there was no test, but great idea. I like using compartments like that can or other throw away containers instead of making or buying one.
it's the concept :D
surely no need to prove that it is working as expected
You NEED the third terminal of the pots connected to signal ground otherwise the voltage divider established by the pots won't work properly. Wired as shown you may find audio leaks through even when the pots are wound all the way down. With the ground connection in place, turning the pot all the way down shorts the 'wiper' terminal to ground, which ensure no audio can leak through.
I am pretty sure he is using them as variable resistors only for this.
Totally gonna make one now! Thank you for this video!
Might have been easier using a step bit, they tend to be gentle. They will not grab and pull the tin up the bit. So you are using point to point rather than a PCB. That makes sense. JohnAudioTech built a nice little preamp in a plastic case. I am thinking of building something like these and looking for ideas, so thanks for the video.
Can you show us the demo how it works..
No diagram, no test...
Great little project, i plan to build one. One note - you could have put the pots on the bottom and jacks on the sides and the lid would then be the bottom and opening it would not need the flexibility and length of wires as nothing is mounted to the lid.
Great idea!
But he's really selling Altoids...
MrBrymstond fresh breath pays for itself in the long run.
I would really like to hear it. See if there's any hum. wondering if there was a need for resistors, or capacitors, or logarithmic pots instead of linear.
Annak idején sztereo - mono jelközösítőt építettem két RCA bemenettel egy RCA kimenettel. A jelbemenetre egy 25K sztereo potmétert, a mono kimenetre egy 47K mono potmétert raktam. De fém doboz helyett müanyag dobozt használtam.
Thanks and is it a good idea to cover resistors ,bcuz they may heat. Ain't they?
There should not be enough power going through a audio cable like that to generate any sort of noticeable heat.
Good tutorial of making holes in a mint tin. But about wiring...
More likely, how NOT to make holes in a mint tin... My impression of his thin metal fabrication skills is that he should stick with thicker plastic since it is more forgiving...
Great idea. I am going to make something very similar. Where could I buy the parts? I see pats on amazon but I can't find any headphone jacks online.
Parts are on Amazon and mouser
Hello, Glen! Very good video, thanks!
I want to build my own and simple mixer to mix up my PC sound card's sound and the C64 (old machine) sound. It's sound comes from RCA. Will it be the same task? I guess it's "yes" but who knows, maybe there are some nuances...
Also it's interesting to see the scheme (yeah, I know it's simple :) ).
One more (important) question: the box carries "ground". Is it safe to leave it non-isolated? Can it cause some shortcut with destroying some audio components that will be plugged into this mixer?
The drill section of this video had me anxious and sweating.
I was sweating too but it was because it was a hundred degrees that day. Thanks for watching.
i suggest u draw some simple schematic of the wiring and add it to the description of the video. For many if not most people interested in making the project, this video is going to be relatively useless. Sure they will make the holes and try to figure out the wiring from reading the comments section and hoping they find someone with the information, But that's not easy for those with no experience with electronics. Some general specs would be nice too (what it can be and cannot be connected too), or else someone might connect this to an amp and fry it.
lol, u serious? :D
just watch 13:42
Yeah would be a great help... goes from individual parts to a complete project with little explanation.
pronounced po ten she om mitter....
Hindi me Batao
If I wanted to connect a phone and computer, while allowing to do phones calls what would need to be different. In other words, there would be an output from the computer to the mixer and an output from the phone to the mixer that would also receive voice audio. The output on the mixer would be able to do headphones with mic as well.
radio shack makes a phone voice recorder. it's an audio splitter that comes off of your handset into a headphone jack. they're $20.00 at most. you can probably find one on amazon.com. once you have that device, plug that into one channel of your board, then the computer stereo out into another channel. your mic unfortunately will need to be the handset of your phone, or the other person can't hear you. This board unfortunately is not advanced enough to pull off mix-minus capabilities, and route your mic back to a caller, without creating a hell of a loop.
Hello glen,
i have some questions and it would be nice if you could help me.
could you tell me where you got all your stuff from? A link would be nice.
Is there a difference between the input and output audio jack?
And is this stereo or mono? And if it is mono, is it a lot more to do it with stereo?
Btw nice project
I'm getting the parts together for you. I purchased everything from ebay, using these search terms:
Potentiometers
5 x 10K Ohm B10K 10KB Linear DUAL Taper Potentiometer Pot 17mm Shaft
Knobs
10 Pcs 6mm Shaft Hole Dia Potentiometer Pot Knobs Caps WD
I'm still working on the stereo headphone ports, I will get back to you and post it here. I need to make a schematic too, check back shortly.
+glencouls Thanks man
+Robert S you want to look up "5 pin stereo 3.5mm or 1/8th inch headphone jack" on ebay. 5 pins are Ground, L -, L +, R -, R+. They may not be pinned that way directly, you may want to pipe some audio through them to confirm pinout before you start to solder. The stereo headphone Jacks i selected were long, not fat. I think fat might conflict for space too much. Working on wire diagram with my new Surface tablet. I will get back to you soon with a diagram.
+glencouls Thanks. Right now I don't have time to build it, but in a few weeks or month I will definetly try it.
+glencouls I have another stupid question: What thickness of the wires is recommended for audio stufff like this or what did you use?
cool, thx for the vid, would it possible to add a tone control for one channel?
prob need a bigger tin?
can you have 3 outputs each with 3 nobs to control volume
okay so if i'm understanding this correctly, you have 3 channels in, one out, and no cross-fading, right?
Jay Pee yes
This guy must have never heard of a step-drill bit.
Step drilling would tear that little mint tin to pieces, but you go ahead and try it.
That's awesome!
Thanks man, I need to get back to this and make a two channel fader with Amp. I purchased all the parts. Coming soon.
Is this sopport mic?
I read somewhere that linear potentiometers don't work for mixing, but you have to get audio ones. Is this really true? Also with these same parts could you make four inputs too. I wonder if you have to buy a higher K resistors for more inputs?
Isaac Parker yes that is true I know how to fix that but it will be to long for a comment so look it up I don't mean to be rude
Simple solution www.digikey.com/product-detail/en/tt-electronics-bi/P160KNP-0EC15A100K/987-1717-ND/5957461
can we use 3.5 jack in output ?
Yes, really any output you want will be fine. Stereo in, probably means you want stereo out.
why is there a resistor in the last kabel befire the output?
At 6:36 you say rider. That is actually called a TANG.
Since you will most likely won't be putting any force
on the POT's. Use a pliers and snap it right off.
Ted Mieske great suggestion with the pliers, thanks for your correction.
Thanks! I will subscribe and Thumbs-Up.
I always break them off :D
No, really! LINEAR (B10K) pots for an AUDIO application?? You should replace them AS SOON AS POSSIBLE with LOGARITHMIC ones (A10K). Because the human hear has a logarithmic response, you know... Other than this, there would be enough room for a fourth channel.
what's the difference with all those amps using linear? or those are 'converting' the pot changes to logarithmic values(at least seen that emulated on arduino)?
Poor soldering!
You should start adding solder when you are touching the wire with the iron.(not solder to iron, then to wire just everything at Once)
Actually this is the right way
I want to know how it works
"Potentio
meter".
Hi, I would like to build one of these however I was wondering if you could post or send me a parts number list. (the audio pot meters & headphone jack parts you used &/or a circuit diagram with this on it. Thanks!
Mandalorian Mercy yes, I have been needing to put this list together for a while now. please subscribe, that will give you advance notice when I release the video for that. I just purchased some USB female inputs which I will be using to create a powered version of this same mixer. this will give me a 2watt amplifier that will hopefully counteract the 10percent volume drop at the resistor I have been experiencing. This will just be USB powered, not USB data.
Alright, so I subscribed. I like your stuff, just wish you'd show the circuitry part in more detail. Any chance a quick list of parts numbers could be compiled though? Perhaps posted in the video description. I've been scratching my head over how to wire the audio in jack - pot - (resistor) - audio out jack connections. I understand you have the grounds linked between the audio jacks (i think). How are you wiring the left and right audio to the same pot?
I'd expect the pot 3 pins to be "left audio in, left audio out, ground". So I don't see how you can be using 1 pot per audio in ports. Can you clarify this for me?
Mandalorian Mercy I will get to this soon. I have to paint my condo today in preparation for renting it out. then I will open the mixer and get the information you need.
the pots are double tapered so there are 6 pins per pot. list below, sorry I'm putting this together trying juggle a crazy busy life right now. video and drawing to follow eventually.
Parts list, all from ebay. except resistors from radioshack going out business sale.
Knobs: 10 Pcs 6mm Shaft Hole Diameter Potentiometer Pot Knobs Caps
Pots: 5 x 10K Ohm B10K 10KB Linear DUAL Taper Potentiometer Pot 17mm Shaft
Jack: 3.5 mm Jack Panel Mount Female Stereo 1/8" Solder Terminal Audio Jack
Resistors: 1k I think you need 6 but I need to open the box again and count.
oh yeah, forgot... 1 mint tin and lots of fresh breath. LOL. solder,wire, etc.
very inteligent but you did not show us how to connect its qulity and everything etc
That's so good vdo but confusion in wireing so pls. if possible do diagram on paper.. tnx.
Rahul Kapoor I am working on a new version that takes power from USB, this power is used to amplify the signal so there is no longer a drop in audio level. I will document the wiring for both then. I'm sorry for the delay on this, I have moved an prepping my old condo for a renter to move in. life has been very, very, busy.
Can't wait to see that new video
Where the hell is the DEMO and the REVIEW ???!!!???!!!
what exactly is the point of the resisters?
+DRAWNBOX to avoid cancellation of two audio feeds. We want a mix, not an abrupt drop out.
so, it weakens the signal so both can exist?
+DRAWNBOX "if you gradually delay the audio going through the second channel, the peaks and troughs of the two audio waves shift out of alignment. Because of the unique properties of sine waves, the combination of the two channels will now still produce a sine wave of the same frequency, but its level will be lower than if the two channels were in phase, and we say that partial phase cancellation has occurred. When the second channel is delayed such that its peaks coincide exactly with the first channel's troughs (and vice versa), the two waveforms will combine to produce silence. At this point we say that the waveforms are completely 'out of phase' with each other and that total phase cancellation has occurred." The resistors prohibit the phase cancellation, in theory anyway.
sorry to wait so long to get back with you, but I had to look this up. My previous answer isn't exactly wrong, it just lacks all technical detail and an explanation of what is happening on an audio theory level. I'm not trying to come off like a sound pro here, a good audio engineer is worth their weight in gold. When it comes to this stuff I'm a tinkerer at best. I have wired studios for TV and Radio but I consider that more component installation over audio engineering. Thanks for watching my video. I'm going to be installing some tablets in my car with 5.1 digital surround sound. if interested please subscribe.
i want to see if that would really works.
pick up the parts, you will enjoy the project, and have a working audio mixer when finished.
glencouls Can u build another one? and i'll buy it. Hehe 😂
+Wolfram John Odtojan that's no fun for either of us. the next thing I build will be a USB powered amp for it.
Im really confused of making of it. I dont think if it works.
Can you pls upload a video showing how it really works. please
what if we dont use a resister
+julian preciado thanks for your question. As I understand it, the resistors have two functions. 1) to knock the audio level down a little so audio isn't coming in too hot. 2) to avoid mic cancellation or component cancellation when too feeds of similar audio are competing for the same channel. Our aim here is a mix and not abrupt cut, or the bass of one channel coming through more noticeably than the other. The resistors help facilitate that over a bare wire.
How much resistance
+ravis T, 1k or 1000 I go over this at about 12:15 (I may have said it too fast), this will result in slight drop in audio levels, up to 10%. I'm running my audio into a computer, so I can just boost the audio level in the computer up a little over unity, and it's no big deal. Depending on your application, you may want to add a small power amplifier circuit. I have not modes that in to this yet. I want to see if I can power one using USB, in the future. So many projects, so little time.
+glencouls good , you shoot video to show us
The picture how to wire, please
Get a cheap Hot Air Gun at: Harbor Freight!
No test in the end. What a bollocks
You butchered that lid, but great video, a pair of side cutters would trim the slithers left my the drill neater than a hammer. Also I think whoever showed you how to tin cables does not like you you heat the cable and bring the solder to the cable stabbing at it defeats the flow bond.
Please send me circuit diagram
po ten she o meter lol
Sond
The pots are not meters. The are potentiometes all one word. Look it up.
While it may not conform to your pronunciation, a pot DOES actually meter, a pot is a sliding or rotating contact that forms an adjustable voltage divider so at full open you get 100 percent and at full closed you get a diminished volume sometimes zero or off, other time 5 or 10 percent. So actually it does meter. I suppose percentage could be seen as potential so there you go mash them together. Say it any way that floats your boat, it's metered.
Video is already produced not changing it now. Will on second video adding amplifier since you guys like "mitter" so much, thanks.
Gac ngerti bosone
Nice try.
Incomplete
For gawds sake, show people the proper way. Use a CENTRE PUNCH, not a bloody nail.
John Coops thanks John, I didn't mean to upset the gawds. I had no idea a finishing nail was so offensive, it did do a decent job, and the only punch I had that moment was really too wide, it does pay to have the right tool for the job, but sometimes improvising works, or screws up the project beyond any help, I'm glad it turned out OK.
You are making an instructional video. Show people the correct way to do things, and then by all means show them ways to improvise (I have no problem with that). But I just noticed your soldering technique and wire tinning instructions, and that is just hilariously wrong, so the holes are the least of your problems.
John Coops john, if you have a better model then by all means upload it. I have had no problems with my solder joints and the stereo pots have been working fine since installation. it's incredible to me how somebody such as yourself with zero posts is throwing rocks at somebody who is trying to pass a little bit of knowledge with a build that works and they enjoy so that others may have a similar experience. Good luck with your next project.
You obviously are an idiot. There are no stereo pots. It hasn't been working fine... THIS CANNOT WORK. Hint: all the inputs are short circuited. ROFL - what a troll. Show us a video of the unit working, go on.
John Coops John the wiring is not shorted. These are stereo pots and there are stereo inputs and one stereo output. Why are you relying on name calling when challenged? Is it because you would rather tear something or somebody else down under the ambiguity of the Internet instead of taking the initiative with your know it all attitude and creating a video of your own? I find it interesting that you are calling into question my credibility (the troll comment) when you don't have a single video posted to your account. You contribute nothing but are willing grade others work so readily, and you post so frequently it is really peculiar behavior. I don't do this to make money, or look for fame, I post these little videos to help people and show what worked for me, also a record for me to look back on how I did something. If you don't like me, or my video please don't make the project. it's that simple. please feel free to keep commenting however, everytime you do, the video earns another view which pushes this "idiot" video (as seen from your eyes) over other legitimate how to videos, something you should be proud of, so please keep commenting.