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Tasklist

FS#12350 - Clipv2 - Rockbox duplicates samples - effectively halves samplerate

Attached to Project: Rockbox
Opened by neum (neum) - Thursday, 27 October 2011, 01:21 GMT+2
Task Type Bugs
Category Recording
Status Unconfirmed
Assigned To No-one
Player Type Sansa AMSv2
Severity Low
Priority Normal
Reported Version Release 3.9
Due in Version Undecided
Due Date Undecided
Percent Complete 0%
Private No

Details

What the title says.
At whatever sample rate I use (24k & 48k tested), each sample is duplicated.
   R_MIC_111026-155059.png (247.8 KiB)
   repeated samples - effective 12k samplerate.png (9.6 KiB)
This task depends upon

Comment by neum (neum) - Thursday, 27 October 2011, 01:32 GMT+2
More info since I hit submit early.
This behavior doesn't appear in the OF, which records at 24k.
I record in wavpack, but it appears in mp3 too. I doubt format is relevant.
Comment by MichaelGiacomelli (saratoga) - Thursday, 27 October 2011, 02:32 GMT+2
Confirmed. However, it only happens in stereo mode. And in stereo mode, the second channel is actually a weirdly scaled and 1 sample time delayed copy of the first channel. My guess is that the code thats supposed to be mirroring the mono into stereo actually mirrors two samples into L, then mirrors two into R.

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