The amplifier followed the path of so many other amplifiers, with increasing glitches over the years.  The lion kingdom could do better.  There's now a 12V brick which could replace the flaming hot 12V regulator.  The recycled HTR-5230 parts which convert TOSLINK to analog have randomly shut down with increasing frequency.


The plan was to go to an STM32 based USB soundcard.  Since then, the lion kingdom has made sound recorders using a raspberry pi zero W for storage & networking.  They use an STM32 for audio sampling.  Such a thing could use the STM32 to convert USB to a DAC & feed digital audio to the raspberry pi for recording. 

It would go a step further, implementing dynamic range compression in the STM32.  The raspberry pi would present a front end over wifi, with VU meters, realtime processing options, recording options, but not EQ.  The lion kingdom has only ever had the EQ in a fixed position.

This might be combined with the CP-33 upgrade to wifi recording.