fruit-bat

Looks like it could... https://files.waveshare.com/wiki/RP2040-PiZero/RP2040-PiZero-Schematic.pdf ...but I don't think it matches any existing target. Do you have one?

I think it will need a new target. The pinouts don't look like they match to me. I will have a go as you are happy to test. Might take...

Unfortunately, it's not quite that simple. The timing of the audio output is approximate. To get the audio input to work I use a PIO processor to buffer and synchronise...

It's not a bother. Can you tell me which firmware you are using or send a pic of your keyboard.

CAPS and the menu button should do it. Give that a try on something quick and let me know if it works.

So, obviously not much chance of this working, but does it do anything? (you will need to unzip the uf2 to use it) [ZxSpectrumPiZero.uf2.zip](https://github.com/fruit-bat/pico-zxspectrum/files/14320108/ZxSpectrumPiZero.uf2.zip) PWM audio on GPIO 17 USB...

Wow, that's a promising start! Yes, you need an adapter.

I agree it might be nicer to have a menu option. Also, not sure the menu 'back' button will be very easy with the case close. Maybe CAPS-Enter for back...

I've not added the menu option yet but have just been doing a little testing. CAPS-Menu is working fine for me with this firmware. I do not get rapid switching...

I've added a save option to the snapshots explorer (6=SAV). On the menu SYMBOL is a period (.) and SHIFT-0 is delete. You can add your own sub folders to...