Hi, Some time ago I have published the wireless system for electric guitar base d on ATmega microcontrollers, RFM70 radio modules and CS5343 ADC:
It seems to me, that ESP8266 may be used instead of ATmega88 and RFM70 in t he transmitter, eliminating also the need of dedicated receiver (as the sou nd and control data will be transferred via WiFi to the computer running th e virtual guitar processor/amplifier). Of course TCP over WiFi network will introduce certain (fluctuating) delay , but alsa_in module can easily filter it out at cost of certain latency (I 've already tested it, checking possibility of building of such a system wi th Raspberry Pi:).
The ESP8266 can provide much better audio buffering capabilities than ATmeg a88, and use much less power then Raspberry Pi. It can also handle switches /potentiometers via I2C or SPI connected DIO and ADC chips. However before attempting to implement such a system, I'd like to know if t here is any good documentation about using of I2S capabilities of ESP8266?
I'll appreciate any sugestions and comments, Regards, Wojtek