Hi all,
I recently changed from a HAT DAC to a USB DAC. I am now hearing crackling and at times drop outs in the audio.
Here is what happens:
Play a track -> now and then hear a crack/pop & also now and then a drop out as if the raspberry pi is not keeping up
The system setup:
Raspberry Pi 3B
Transcend High Endurance 16GB microSD
Official raspberry pi PSU
Official raspberry pi 7" touch screen
USB connected SSD
USB Bluetooth dongle
Onboard WiFi OFF
Onboard Bluetooth OFF
MPD Device type USB with volume control disabled - USB DAC (Topping D10)
Bluetooth renderer on
Airplay renderer on
So far I checked the following:
Checked cpu utilisation - idle > 49%, mostly >80%
Checked Topping D10 with a Win 10 laptop, using the FLAC files stored on the raspberry pi connected SSD - works fine, no issues
Tried SoX resampling on and off, different rates and multithreading - does not appear to make a difference
USB (UAC2) fix on and off - no difference
Polarity inversion on and off - no difference
Volume normalization on and off - no difference
Buffer size tried smallest, largest, and another - no difference
Different microSD cards - no difference
The cracking happens when playing from SSD, Bluetooth and via Airplay.
It may be the power supply, or too many things plugged in to the USB ports (SSD, Bluetooth dongle, DAC). It could also be something else. What can I check before buying a new psu or only having the DAC as the only thing connected?
I recently changed from a HAT DAC to a USB DAC. I am now hearing crackling and at times drop outs in the audio.
Here is what happens:
Play a track -> now and then hear a crack/pop & also now and then a drop out as if the raspberry pi is not keeping up
The system setup:
Raspberry Pi 3B
Transcend High Endurance 16GB microSD
Official raspberry pi PSU
Official raspberry pi 7" touch screen
USB connected SSD
USB Bluetooth dongle
Onboard WiFi OFF
Onboard Bluetooth OFF
MPD Device type USB with volume control disabled - USB DAC (Topping D10)
Bluetooth renderer on
Airplay renderer on
So far I checked the following:
Checked cpu utilisation - idle > 49%, mostly >80%
Checked Topping D10 with a Win 10 laptop, using the FLAC files stored on the raspberry pi connected SSD - works fine, no issues
Tried SoX resampling on and off, different rates and multithreading - does not appear to make a difference
USB (UAC2) fix on and off - no difference
Polarity inversion on and off - no difference
Volume normalization on and off - no difference
Buffer size tried smallest, largest, and another - no difference
Different microSD cards - no difference
The cracking happens when playing from SSD, Bluetooth and via Airplay.
It may be the power supply, or too many things plugged in to the USB ports (SSD, Bluetooth dongle, DAC). It could also be something else. What can I check before buying a new psu or only having the DAC as the only thing connected?
