Corrupted buffers due to clock drift with adaptive mode ADC (recording)
Corrupted buffers due to clock drift with adaptive mode ADC (recording)
- Subject: Corrupted buffers due to clock drift with adaptive mode ADC (recording)
- From: Jean-Charles Rousset <email@hidden>
- Date: Fri, 19 Aug 2016 21:29:14 +0200
| Hi,
The technical note TN2274 about USB Audio on the Mac stipulates that Adaptive mode is not supported for input stream (recording), only Synchronous and Asynchronous.
It is actually quite surprising as tons of consumer products integrate CMedia or TI chips (usb audio converter) which use Adaptive mode for record.
I tested a lot of them (cheap or not), also developed PCBs and hardware with different chips and, indeed, audio buffers are quickly corrupted probably due to a clock drift.
What is exactly the limitation to support it on Apple products ?
Note : I never had any problem with DAC (playback). Only ADC (record). Note2 : it works on Windows & Android.
Thanks in advance.
Best regards,
Jean-Charles
|
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