Gradual crackling/stuttering during audio capture
Gradual crackling/stuttering during audio capture
- Subject: Gradual crackling/stuttering during audio capture
- From: Rob Watson <email@hidden>
- Date: Sat, 24 Jul 2010 13:33:33 +0100
Hi list
I'm using CoreAudio (wrapped in MTCoreAudio) to record from an interface called a Maya44 USB. It's a pretty typical, 4-in 4-out audio interface.
I have spent the last few days trying to work out why recordings using this interface deteriorate in quality after about 45 seconds. Everything is fine at first, but then crackling/popping gradually sets in.
This happens in my own code, and I assumed it was a bug in my audio processing code. But then I tried to record using Audacity and got exactly the same effect. Here is a short example .WAV file (recorded in Audacity)
Because of the gradual onset it sounds like some kind of sample-rate or clock drift, but I don't know how I could affect any related parameters. I've also tried analysing using the telemetry window in HALLAB, but there is no overloading or dubious cycles highlighted.
Any pointers on where to start here would be greatly appreciated :)
R.
_______________________________________________
Do not post admin requests to the list. They will be ignored.
Coreaudio-api mailing list (email@hidden)
Help/Unsubscribe/Update your Subscription:
This email sent to email@hidden