[sdiy] Arp Quartet ADSR issues

[Peter Pearson]

Those things sound great but they're made of plastic.  Not saying it's your
issue, but it's worth looking for physically damaged switches on the panel
board and bad solder joints on the connectors.

On Sun, Aug 4, 2024 at 6:09 PM Adam (synthDIY) <synthdiy at adambaby.com>
wrote:

>
>
> On 5 Aug 2024, at 4:58 AM, Ben Walker <ben at audio.computer> wrote:
>
>
> The KYBD GATE signal that is sent to the keyboard bus bar sits around +5V
> for the working sounds, and close to 0V for the others. So there’s no
> voltage hitting the input pin of the TDA1008, and therefore no output.
>
> Are you saying that the presence of the keyboard gate voltage is
> determined by which sound group you select from the front panel?
> That seems like an odd arrangement!
> That certainly needs more investigation!
> A
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