Any recommendation for the followings:
1. Arduino audio board module that can do asynchronous call ( simultaneously plays multiple sounds ) with UART command navigation ?
( NOTE: DFPlayer and Adafruit FX audio board don't have any asynchronous feature, Teensy is expensive for a small project, other PCM waveform related using passive speaker projects not suitable because a simple "HelloWorld.wav" 8-bit PCM unsigned mono already taken about 10kB file size at 11025 sample rate.
2. Tone melody composer software that can convert to C/C++ format with frequency and delay ?
( NOTE: Tone() api required frequency and duration together, there are many tone samples and articles but none of it mentions the tone composer software thus cannot create own musics. )