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Audio Quality Issues on OMAP4460 using the BT UL MCBSP1 port

Prodigy 170 points

Replies: 1

Views: 837

Hello All,


After some effort was finally able to get the voice captured(recorded) from a external audio chip using the MCBSP1 port of the OMAP4460 from user space using the mixer commands for BT path. But the issues seems to be the  quality of the audio recording. When the recoreded wav(16khz, 16bit Mono PCM) file is opened in the Audacity, the spectrogram of the waveform look like they are repeating 4 times for every sample. We expect a minimum of 8k data in the spectrogram. But we see only 2k data repeating 4 times. Hope this make sense. Will see if i can put a snap shot of the same.

We need to record voice and it should be a direct pass through to the user space w/o any data manipulation from the ABE. Given the AESS and ABE firmware as part of the OMAP4, is it not possible to disable the ABE blocks and get data w/o any manipulation to the user space ?

The AESS and ABE is a black box for me and not sure if this is causing any issues in the audio path. Though we are using the BT UL path, we dont intend to use it for BT applications.

Any help would be appreciated.


Thanks,

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