Crackling sound

[will]

I have a tube Dac using XMOS 500 MIPS XS1-L1 processor which produce very great sound.
http://www.musicalparadise.ca/store/ind ... duct_id=56

However, crackling sound happen in between tracks which are in different bit rate, e.g. when a 16/ 44.1 track follow by a 24/96 track, crackling sound happen in between the gap of the tracks.

But, if I add the below line in the MPD config:-

format "96000:24:2"

The crackling sound disappear in between tracks but happen during playing some of the tracks.

Compatibility fixes in the setting can't help.

Anything that I can do to fix the issue?

[Orion]

Very strange problem.

Please can you report here your debug informations?

[will-1]

Did some research on crackling sound, and would like to share for your information:-

The Dac - Musical Paradise MP-D1 is using a AK4399 chips, which is very sensitive, when switching songs which are in different sample rate i.e. form 16/44.1 to 24/96, the IS2 signal would be suspended for a very short period, the crackling sound happen.

However, if up-sample or down-sample all the songs at the same sample rate, as the IS2 signal would not be suspend during switching in between songs, crackling sound would not happen.

If we can keep the IS2 signal always on when switching different sample rate?? That may solve the problem of crackling for dac which using AK4399.

[cmh714]

you can set the default up or down sample rate in mpd.conf

[Orion]

Did some research on crackling sound, and would like to share for your information:-

The Dac - Musical Paradise MP-D1 is using a AK4399 chips, which is very sensitive, when switching songs which are in different sample rate i.e. form 16/44.1 to 24/96, the IS2 signal would be suspended for a very short period, the crackling sound happen.

However, if up-sample or down-sample all the songs at the same sample rate, as the IS2 signal would not be suspend during switching in between songs, crackling sound would not happen.

If we can keep the IS2 signal always on when switching different sample rate?? That may solve the problem of crackling for dac which using AK4399.

Hi Will,
I think there is a bug in the USB firmware that drives the XMOS chip installed in your DAC. In fact I own a similar DAC that uses AK4399+XMOS and I have no issues.

Hi-end DAC XMOS AK4399 USB I2S 24Bit 192K DAC decorder by weiliang

New-Xmos-AK4399-USB-I2S-24bit-192K-DAC-Decorder-Assembled-Board-by-Weiliang.jpg (113.87 KiB) Viewed 2898 times