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by steve
Thu Apr 10, 2014 5:35 pm
Forum: General Audio Programming
Topic: Need pointers on adding feature to search pattern
Replies: 20
Views: 14174

Re: Need pointers on adding feature to search pattern

Robert J. H. wrote:That's the snippet to do it:
Very nice Robert.
by Robert J. H.
Thu Apr 10, 2014 2:51 pm
Forum: General Audio Programming
Topic: Need pointers on adding feature to search pattern
Replies: 20
Views: 14174

Re: Need pointers on adding feature to search pattern

Cross correlation is a reasonable starting point, it has it's draw backs though. Let's take a simple example: audacity.wav The search pattern is roughly in the first 18000 samples -- nearly a second at 22.05 kHz. We will now try to search for it with convolution. This is nothing but correlation, if ...
by steve
Thu Apr 10, 2014 1:31 pm
Forum: General Audio Programming
Topic: Need pointers on adding feature to search pattern
Replies: 20
Views: 14174

Re: Need pointers on adding feature to search pattern

Feature is to be able to select small section from an audio waveform and locate all occurrences of that section in the complete audio file. The general case of selecting an arbitrary sound, then searching for that sound, is very difficult to implement. There are specific cases that are much more si...
by audio-enthusiast
Thu Apr 10, 2014 8:05 am
Forum: General Audio Programming
Topic: Need pointers on adding feature to search pattern
Replies: 20
Views: 14174

Need pointers on adding feature to search pattern

Hello, I needed a feature in Audacity but it's currently not present. Therefore I'd like to code it myself, but need some initial pointers/comments. Feature is to be able to select small section from an audio waveform and locate all occurrences of that section in the complete audio file. This could ...
by Gale Andrews
Wed Apr 09, 2014 10:19 pm
Forum: GNU/Linux
Topic: Google Chrome App
Replies: 2
Views: 2504

Re: Google Chrome App

Let op: wij spreken geen Nederlands op dit forum. Het volgende is een automatische vertaling. U kunt Audacity niet op Chrome OS, omdat Audacity ondersteunt geen Chrome OS en niet op het web bevinden. Als Chrome OS is gebaseerd op Linux is het vrij eenvoudig om Linux Ubuntu (of een Chrome OS variant ...
by Gale Andrews
Wed Apr 09, 2014 5:53 pm
Forum: GNU/Linux
Topic: Audacity doesn't show the waveform
Replies: 6
Views: 4063

Re: Audacity doesn't show the waveform

Actually my pendrive is running NTFS and it's 16 gigs. So, I don't understand the Windows error but it doesn't matter because there is no point moving the project to Windows. there's nothing in data folder. In that case, why did Windows see 2.96 GB in the data you were trying to copy? Make sure you...
by Gale Andrews
Tue Apr 08, 2014 10:41 pm
Forum: Windows
Topic: Can't record from digital piano using audio cable
Replies: 3
Views: 9070

Re: Can't record from digital piano using audio cable

Hmm, the recording tab only gives me Stereo Mix and the regular microphone, it doesn't say anything about an external microphone input. It does show disabled and disconnected devices, so it mainly seems that it just does not recognise that there is a cable from the piano to the computer Is it a TRR...
by damian01211
Tue Apr 08, 2014 7:10 pm
Forum: GNU/Linux
Topic: Audacity doesn't show the waveform
Replies: 6
Views: 4063

Re: Audacity doesn't show the waveform

No, the waveform isn't there. I'm unable to choice Fit in Window. Yes, the recording meant to be nearly 6 Hours. Actually 5h and 55 Mins as I can see where it stop. I have no idea how to split the project. I've search the google but nothing. The log only show's that. I remember there was twice the e...
by Gale Andrews
Tue Apr 08, 2014 6:24 pm
Forum: Windows
Topic: USB mic hiss/white noise
Replies: 22
Views: 8966

Re: USB mic hiss/white noise

Double-shielded USB cable or ferrite beads wrapped around the cable can sometimes help with RF noise. Terrific idea. Part numbers and sources? Ferrite Rings: http://www.maplin.co.uk/p/ferrite-ring-hem3016-qt26d http://www.radioshack.com/product/index.jsp?productId=2103222 Double-shielded USB cable:...
by xinamarieuhl
Tue Apr 08, 2014 6:26 am
Forum: Audiobook Production
Topic: Manipulating Decibels
Replies: 119
Views: 22044

Re: Manipulating Decibels

I just submitted the files for review. We'll see what they say ... We are so on the edges of our seats — across nine time zones. While we're waiting, I wouldn't complain if you posted some of the Before performance. I want to get a feel for the starting point. Chris won't fix you if you're just too...