I have been trying to get clean audio from raspberry pi 0w. Tried PWM audio + audio amplifier but the audio is noisy. So bought a cheap usb sound card and added an 3W+3W PAM8403 Amplifier. Now the sound quality is much better.
Now i have a different problem. At volume (alsa) 2% I could not here any sound and at volume 3% its too loud and if I still increase to 5% the volume its distorted. Added 10k resistor between sound card and amplifier as below
Now volume got reduced but still high.
How do i get smooth volume control?
Increase the 10k ohm resistor
Add a resistor potential divider between left channel & ground and right channel & ground (resistor values?)