Search found 6404 matches

by Trebor
Sat Dec 25, 2010 7:23 pm
Forum: Audio Processing
Topic: Auto Synchronize two sine waves
Replies: 10
Views: 3549

Re: Auto Synchronize two sine waves

... automatically resample/stretch the taped one, I had a similar idea ... This sounds like a job for an autotune-type effect but with real-time adjustment of tempo, rather than pitch, to correct for the variations in tape speed. http://forum.audacityteam.org/viewtopic.php?p=114007#p114007 I think ...
by Trebor
Thu Dec 23, 2010 10:54 am
Forum: Windows
Topic: Transferring file from my Sony recorder to computer
Replies: 2
Views: 2384

Re: Transferring file from my Sony recorder to computer

ICD-P520 Instruction manual page 43,.png ICD-P520 Instruction manual … http://www.docs.sony.com/reflib/docget.asp?manualid=94367&template_id=1&region_id=1&DL= Proprietary (Sony) software … http://esupport.sony.com/US/perl/swu-list.pl?mdl=ICDP520 [~100Mb !, includes drivers] Apperently t...
by Trebor
Wed Dec 22, 2010 10:43 pm
Forum: Recording Techniques
Topic: Noise when recording vinyl
Replies: 18
Views: 5488

Re: Noise when recording vinyl

... you'd think the platter mat would damp it out. Maybe the (25 year old ?) rubber has gone stiff with age. ... If you do a plot spectrum at this point you can clearly see the peak at about 3900 Hz. If all else fails can notch out 3909Hz ... Turntable 'noise' before-after notch [email protected]' 3909Hz.mp3
by Trebor
Wed Dec 22, 2010 9:33 pm
Forum: Recording Techniques
Topic: Noise when recording vinyl
Replies: 18
Views: 5488

Re: Noise when recording vinyl

The spectrum of the 'noise' sample looks like a comb ... 'noise', spectrum looks like a comb.png this can be caused by feeding back a delayed version of the signal. Look for sources of feedback, e.g. check you are only recording the turntable, (the not turntable and the output of Audacity). The feed...
by Trebor
Wed Dec 22, 2010 8:36 pm
Forum: Audio Processing
Topic: Using audacity to measure the speed of sound
Replies: 17
Views: 5809

Re: Using audacity to measure the speed of sound

... how accurately the distance from the sound source to each of the "microphones" can be made. Do we need to know source-mic distance ?, provided the source and earbuds are all on a straight line only the distance between the earbuds is relevant. The only other thing which might be worth...
by Trebor
Wed Dec 22, 2010 4:17 pm
Forum: Audio Processing
Topic: Using audacity to measure the speed of sound
Replies: 17
Views: 5809

Re: Using audacity to measure the speed of sound

It doesn't work with earbuds. They're not large enough to capture enough clap to generate a signal. I beg to differ ... 'using earbuds as microphones'.wav My mic socket is stereo, but you could feed the stereo earbuds into a mono mic socket via a stereo to mono adapter as has been suggested. I'd su...
by Trebor
Wed Dec 22, 2010 10:59 am
Forum: Recording Techniques
Topic: PROBLEM RECORDING W NUMARK MIXTRACK
Replies: 7
Views: 3569

Re: PROBLEM RECORDING W NUMARK MIXTRACK

Your USB device should be on the list of recording devices (along with "stereo mix"), if the USB device isn't shown see here how to make it appear on the list ... It is common on Vista and 7 that not all recording inputs are automatically enabled in the Recording tab. This means they are i...
by Trebor
Wed Dec 22, 2010 9:31 am
Forum: Recording Techniques
Topic: PROBLEM RECORDING W NUMARK MIXTRACK
Replies: 7
Views: 3569

Re: PROBLEM RECORDING W NUMARK MIXTRACK

justinphillipluke wrote:bump
Trebor wrote:You need to enable the USB device (in Windows recording devices) ... http://wiki.audacityteam.org/wiki/Mixer ... trol_Panel
Image
http://wiki.audacityteam.org/wiki/Mixer ... trol_Panel
by Trebor
Tue Dec 21, 2010 10:03 pm
Forum: Recording Techniques
Topic: Comparing two sound files both 256kbps, but different (pics)
Replies: 10
Views: 3979

Re: Comparing two sound files both 256kbps, but different (p

check out the two files let me know what you think. They are virtually identical : if you invert one and play them in sync with each other they cancel out when the amplitude matches ... Vocal disappears at 9 seconds (destructive interference).mp3 Different version of LAME encoder used on each, and ...
by Trebor
Tue Dec 21, 2010 9:07 pm
Forum: Recording Techniques
Topic: Comparing two sound files both 256kbps, but different (pics)
Replies: 10
Views: 3979

Re: Comparing two sound files both 256kbps, but different (p

The upper version of "super8" is normalized to -5dB, the lower looks like it's normalized to 0dB, (could be clipping). Again if you apply "amplify" (default settings) to both tracks they will both have the same amplitude, (which will not exceed +/- 1.0), then you will then be abl...