sun_yah
Newbie level 2
bluetooth audio noise
Hello all,
I am using wm9713 audio codec in my project. Audio is transferred to Bluetooth module(BTM) using PCM link. The PCM link operates at a freq of 8KHz sampling rate.
PCM data to BTM is directly transferred from a sigma delta ADC.
At ADC sampling freq of 8KHz, I hear a noise like "rrrrrrrrrr" in the background of audio in Bluetooth Headset.
1)I dont know what type of audio noise it is?
2) Is it a jitter audio? because both codec and BTM operate at different clock domains.
3)Can I get a sample audio of jitter noise to identify it?
4) AT 48 Khz samp freq,this noise is not there , but sampling rate mismatch between ADC and PCM link leads to all the high freq sounds get distorted. ie saaa becomes like shhhhhha
Thank you in advance,
Regards,
Sun
Hello all,
I am using wm9713 audio codec in my project. Audio is transferred to Bluetooth module(BTM) using PCM link. The PCM link operates at a freq of 8KHz sampling rate.
PCM data to BTM is directly transferred from a sigma delta ADC.
At ADC sampling freq of 8KHz, I hear a noise like "rrrrrrrrrr" in the background of audio in Bluetooth Headset.
1)I dont know what type of audio noise it is?
2) Is it a jitter audio? because both codec and BTM operate at different clock domains.
3)Can I get a sample audio of jitter noise to identify it?
4) AT 48 Khz samp freq,this noise is not there , but sampling rate mismatch between ADC and PCM link leads to all the high freq sounds get distorted. ie saaa becomes like shhhhhha
Thank you in advance,
Regards,
Sun