about TLV320AIC31 issue

tooyoungtoosimple

hi all,

we are now facing a problem that aic3101 is playing wav files without any BASS(AKA: lack of 'low frequency' maybe), quite different with the same file played from our x86 PC.

and we have 'capture-playback' and 'playback local file only' both tested, and we got the same problem, below is the output when running 'playback local file only':

#aplay -Dhw:0,0 -f cd test.wav -v -V "stereo

Playing WAVE 'test.wav' : Signed 16 bit Little Endian, Rate 44100 Hz, Stereo
Hardware PCM card 0 'TI81XX SOUND0' device 0 subdevice 0
Its setup is:
stream : PLAYBACK
access : RW_INTERLEAVED
format : S16_LE
subformat : STD
channels : 2
rate : 44100
exact rate : 44100 (44100/1)
msbits : 16
buffer_size : 20480
period_size : 4096
period_time : 92879
tstamp_mode : NONE
period_step : 1
avail_min : 4096
period_event : 0
start_threshold : 20480
stop_threshold : 20480
silence_threshold: 0
silence_size : 0
boundary : 1342177280
appl_ptr : 0
hw_ptr : 0

how can i fix the problem ?

over 11 years ago

0 tooyoungtoosimple over 11 years ago

Prodigy 120 points

anybody ?

0 tooyoungtoosimple over 11 years ago in reply to tooyoungtoosimple

Prodigy 120 points

anybody ?

0 tooyoungtoosimple over 11 years ago in reply to tooyoungtoosimple

Prodigy 120 points

anybody ?

0 Abhilash Koyamangalath over 11 years ago in reply to tooyoungtoosimple

TI__Prodigy 375 points

1. When you say playback is different - can you describe how - does it play at a different pitch or are there any gaps or is there some noise superimposed ?

2. What platform are you using ( e.g is it a 8168 EVM or some other board - and what version of the SDK package are you using) ? The latest version of the kernel is contained in this PSP release: PSP 04.04.00.02 which is available for download here : http://processors.wiki.ti.com/index.php/TI81XX_PSP_04.04.00.02_Release_Notes

thanks & regards

Abhilash

0 tooyoungtoosimple over 11 years ago in reply to Abhilash Koyamangalath

Prodigy 120 points

thx for replying

1) I just compare the 2 playback sounds by my naked ears... (the one played on X86 is normal, while the other played on 3101 is far more light, far more quick,,,, nothing else different)

2) I am using 8168 EVM now, and using the default setting of 3101 in linux on the version of DVR_RDK4.0

Further more,

Does it turn out to be the problem that 3101 default setting comes without BASS ???

If so, is there any preset configs that I can set the audio effects register(N0, N1, N2, N3, N4, N5, D1, D2, D4, D5 in 3101 datasheet) ? I am scratching on the calculating of biquad coefficient, what I need is just a simple, mature, on-the-run preset configs

Processors

Processors forum

about TLV320AIC31 issue