Scott, thanks for this. Excellent information. I'm sure I'll have to watch it a few more times to catch everything. Cleared up some of the questions I had though. Looking forward to the next installment. Hoping I can actually catch that one live!
Hi, thank you for a really interesting and informative video. I’ve just got REW and a umik-1 and started doing some tests on my room. Be only watched the fist 30 mins but have already learned things. Better still , your relaxed style is inspiring me to learn more and get some sense out of the tools I’ve got.
Привет! Огромное спасибо за видео! Отличная работа, и отличный канал. Мы в России тоже смотрим это, и пытаемся разобраться и научиться правильно проектировать кроссоверы в своих акустических системах. ) Огромная благодарность, за такие подробные пояснения и стремление объяснить все подробно. Было бы очень классно продолжать смотреть полезные и интересные видео на Вашем канале. Желаю творческих успехов! )
Hi scott, great stuff, but i have some questions. When you measured the output of the amp, did you use a load to the amplifier? 4 ohms, 8 ohms or no load at all? Since output of the amplifier increases as impedance drops, am i getting true 2.84 vots if i follow this method you used if im measuring a 4 ohm woofer and then an 8 ohm tweeter? My amp its an Adcom 545 II and i set my lap top volume at 50% directly to the amp for consistency. Greatings from way down south Mexico.
ok, you dont like scale by formula the sensitivy of the port, but how you do that in your video isnt really clear to me, can you please describe your approach? thanks
Hello. With regards to the impulse setting of the IR window, can you please tell me, due to the sweep total time, does the IR take snapshots of the room every time the IR window time is spent? I'm a little confused with how the rest of the reflections are removed and not just the first reflection. Thank you. I hope you find the time to respond.
@@qihong3886 USB Microphone and he's likely running from his line out on his computer, or has an external DAC that runs rca to his amp. There a lot of ways to do it.
I tryed this and run into an error. when i did measure my woofer in nearfield the impulse response started at -14ms. any idea what went wrong ? tweeter and midrange measurements are ok. i have to say my setup is a bit wired, i use a FA123 for the TW/MR/upper Bass and then i use the XLR out into an FA112 which powers the BR woofer. if this would cause a delay the impulse, the measurement should start after zero or am im wrong ? -14 ms doesn't this mean it is a timing paradoxon, the signal is recorded bevor REW is sending it ;))
REW in single ended mode is really bad about finding the start of a subwoofer post...it's not surprising that this happens. Either use it in loopback mode, or do what I do, which is shift the IR response to get the window to start at 0.
@@speakerscott thank you for the input.i will try that. i was afraid that my idea was wrong (connecting 2 plateamps for a 4 way) . i was searching for an alternate to the omnimic measurments (too much room reflections there) and found it in rew as i saw your video ! ;)
Idk what all the other people are hearing here in this video saying "very helpful, good video" bc this has got to be the worst fkng video in UA-cam history. Talked for a damn half hour and didn't say a damn thing. I'm sitting here with my laptop, REW on my screen, and didn't get a single piece of information to get me started.
Starts @13:30
Very helpful. Looking forward to next session. Thank you for taking the time to share your knowledge! Very much appreciated.
Scott, thanks for this. Excellent information. I'm sure I'll have to watch it a few more times to catch everything. Cleared up some of the questions I had though. Looking forward to the next installment. Hoping I can actually catch that one live!
Hi, thank you for a really interesting and informative video. I’ve just got REW and a umik-1 and started doing some tests on my room. Be only watched the fist 30 mins but have already learned things. Better still , your relaxed style is inspiring me to learn more and get some sense out of the tools I’ve got.
Man I'm loving this stream. Great info that so many people don't consider when measuring.
I finally understand windowing in REW, thank you!
Привет! Огромное спасибо за видео! Отличная работа, и отличный канал. Мы в России тоже смотрим это, и пытаемся разобраться и научиться правильно проектировать кроссоверы в своих акустических системах. ) Огромная благодарность, за такие подробные пояснения и стремление объяснить все подробно. Было бы очень классно продолжать смотреть полезные и интересные видео на Вашем канале. Желаю творческих успехов! )
Incredibly informative and also fun to watch. :D
Thanks scott, still following for the next one 😉
Scott, do you plan on doing a follow up video on this?
"Quieter than atoms moving" lol
Okay...figured out that error at the end...had to do with how I was gating that response, read more here:
facebook.com/DIYRM/posts/1766713203503346
Hi scott, great stuff, but i have some questions. When you measured the output of the amp, did you use a load to the amplifier? 4 ohms, 8 ohms or no load at all? Since output of the amplifier increases as impedance drops, am i getting true 2.84 vots if i follow this method you used if im measuring a 4 ohm woofer and then an 8 ohm tweeter? My amp its an Adcom 545 II and i set my lap top volume at 50% directly to the amp for consistency. Greatings from way down south Mexico.
I just got REW and a DATS w USB mic.
Need to learn this stuff
scott
this is great
do you know how to create convolution wave files with rew but in stereo
for different corrections right and left speakers ?
Skip to around 13:30
Thank you.
very informative, thanks.
ok, you dont like scale by formula the sensitivy of the port, but how you do that in your video isnt really clear to me, can you please describe your approach? thanks
Hello. With regards to the impulse setting of the IR window, can you please tell me, due to the sweep total time, does the IR take snapshots of the room every time the IR window time is spent? I'm a little confused with how the rest of the reflections are removed and not just the first reflection. Thank you. I hope you find the time to respond.
start at 13:31
where do you have the volt meter hooked up when you are trying to get the 2.83v output? Maybe I missed that.
The output of the amplifier....
Hi, i have some questions. Where the test signal comes from? Maybe DATS? And the microphone just connects to computer? Thanks.
If there is some recommendation about hardware, that will help understand the measure.
@@qihong3886 USB Microphone and he's likely running from his line out on his computer, or has an external DAC that runs rca to his amp. There a lot of ways to do it.
@@Clobercow1 thanks for explaining! Now i understand it clearly and will do my own test.
When can we expect this experience to continue? )
I tryed this and run into an error. when i did measure my woofer in nearfield the impulse response started at -14ms. any idea what went wrong ? tweeter and midrange measurements are ok. i have to say my setup is a bit wired, i use a FA123 for the TW/MR/upper Bass and then i use the XLR out into an FA112 which powers the BR woofer. if this would cause a delay the impulse, the measurement should start after zero or am im wrong ? -14 ms doesn't this mean it is a timing paradoxon, the signal is recorded bevor REW is sending it ;))
REW in single ended mode is really bad about finding the start of a subwoofer post...it's not surprising that this happens. Either use it in loopback mode, or do what I do, which is shift the IR response to get the window to start at 0.
@@speakerscott thank you for the input.i will try that. i was afraid that my idea was wrong (connecting 2 plateamps for a 4 way) . i was searching for an alternate to the omnimic measurments (too much room reflections there) and found it in rew as i saw your video ! ;)
Do you have standard implementing paper for me to do? 😂 I need help to be able to clarify what thing to do. 😂
So the sensitivity is 110 DB?
Only measured nearfield....there are correction factors to get the 1m and farfield levels.
LOL, sure, the science kid, we are making the wolrd get better, each time you hear that annoying sound, think about all those little hungry kids
Sorry couldn't get into this. I wish to learn more about REW. IF there's anything useful on here please edit it down and repost it. Cheers.
Idk what all the other people are hearing here in this video saying "very helpful, good video" bc this has got to be the worst fkng video in UA-cam history. Talked for a damn half hour and didn't say a damn thing. I'm sitting here with my laptop, REW on my screen, and didn't get a single piece of information to get me started.
Do you have Instagram too