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fruit-bat / pico-zxspectrum

ZX Spectrum for Raspberry Pico Pi RP2040
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Pre-build question: Can audio input work with Pimoroni? #107

Open EDKGames1 opened 11 months ago

EDKGames1 commented 11 months ago

I saw that tape input is supported on the page. I would like to use a Pimoroni video out board, but I want to be able to use tapes. Will it read/write through the audio jack on the VGA/HDMI interface board? Thanks in advance.

fruit-bat commented 11 months ago

Both the Pimoroni VGA and HDMI builds output audio through the on board DAC. This is because the video library is for DVI not HDMI.

I have seen an example of HDMI output on the Pico (https://github.com/shuichitakano/pico_lib), which is rather impressive. With HDMI output, in theory, the audio can be sent to the monitor.

There isn't audio input capability on either of the Pimoroni boards (https://datasheets.raspberrypi.com/rp2040/hardware-design-with-rp2040.pdf). If there was you would still need a pre-amp for it. There are a couple of examples on the Readme of this repository.

If there is demand for it maybe @bobricius would consider adding it to a future PCB design? It's kind of fun but there isn't really a facility to 'save' at the moment. For save to work the 'buzzer' audio output would need to be less approximate!

EDKGames1 commented 11 months ago

Ok. Is there any way anyone else has added that in, along side the Pimoroni?

On Thu, Dec 14, 2023, 5:57 AM fruit-bat @.***> wrote:

Both the Pimoroni VGA and HDMI builds output audio through the on board DAC. This is because the video library is for DVI not HDMI.

I have seen an example of HDMI output on the Pico ( https://github.com/shuichitakano/pico_lib), which is rather impressive. With HDMI output, in theory, the audio can be sent to the monitor.

There isn't audio input capability on either of the Pimoroni boards ( https://datasheets.raspberrypi.com/rp2040/hardware-design-with-rp2040.pdf). If there was you would still need a pre-amp for it. There are a couple of examples on the Readme of this repository.

If there is demand for it maybe @bobricius https://github.com/bobricius would consider adding it to a future PCB design? It's kind of fun but there isn't really a facility to 'save' at the moment. For save to work the 'buzzer' audio output would need to be less approximate!

— Reply to this email directly, view it on GitHub https://github.com/fruit-bat/pico-zxspectrum/issues/107#issuecomment-1855630771, or unsubscribe https://github.com/notifications/unsubscribe-auth/AYWO6WZC56U5QZEFJ2UNL3LYJLLSHAVCNFSM6AAAAABAT7N7LKVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMYTQNJVGYZTANZXGE . You are receiving this because you authored the thread.Message ID: @.***>

fruit-bat commented 7 months ago

It's been a while, but there has been some progress. There is now firmware for the Demo DV that sends audio over HDMI. I think gpio0/gpio1 are free to use as an input (you still need a pre amp)... It would need a slightly different build, so let me know if you are still interested.

EDKGames1 commented 7 months ago

Thanks for the update after so long. I have a lot of projects so this one is on the backburner right now, but if I get time and the urge I'll check it out. Thanks Again.

On Tue, Apr 2, 2024, 1:11 PM fruit-bat @.***> wrote:

It's been a while, but there has been some progress. There is now firmware for the Demo DV that sends audio over HDMI. I think gpio0/gpio1 are free to use as an input (you still need a pre amp)... It would need a slightly different build, so let me know if you are still interested.

— Reply to this email directly, view it on GitHub https://github.com/fruit-bat/pico-zxspectrum/issues/107#issuecomment-2032604635, or unsubscribe https://github.com/notifications/unsubscribe-auth/AYWO6W3MH7AGWFYNL4ITS33Y3LREDAVCNFSM6AAAAABAT7N7LKVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDAMZSGYYDINRTGU . You are receiving this because you authored the thread.Message ID: @.***>