audio output from midi module

[alienkidmj12]

Would of been nice to see some place to feed the audio from the midi module :) unless im missing it, perhaps an idea for next rev ?

[PhilC]

Do you have a B or a C1 board? C1 needs a resistor fitted and then the audio is sent through with the YM2149 audio. The B needs the mixer board fitted.

[alienkidmj12]

ah so its fed back into the board via the header, nice !!!!

[PhilC]

ah so its fed back into the board via the header, nice !!!!

It is indeed. Check out the fix for the audio bias though which is the resistor I mentioned.

[alienkidmj12]

ok cool

[exxos]

If you're talking about rev C1 , like philc says, it just needs a small resistor fix. This is because I redesigned the audio amp to mix the audio properly. The previous board was fixed using a separate addon board. Its part of the ongoing development. I would suggest reading the past progress and fixes for previous boards to understand how development and fixes have been done.

[alienkidmj12]

what kinda resistor do i need, is there a guide on here somewhere.

[DoG]

what kinda resistor do i need, is there a guide on here somewhere.

100K resistor.

Here is the thread about it and this is how I did it.

[alienkidmj12]

i just looked mate, that is very small area to solder. how much did you have to scratch and with what :) il need to dig out my mag glasses :) im guessing i solder onto the via first then scratch away at the other end, then solder last bit.

[DoG]

i just looked mate, that is very small area to solder. how much did you have to scratch and with what :) il need to dig out my mag glasses :) im guessing i solder onto the via first then scratch away at the other end, then solder last bit.

It's huge! You don't even need a microscope. :D

I don't know what they are called in English and I don't know where I got them from. But I took a photo of a couple of them. But you could scratch a bit with a scalpel. You just remove the thin layer of solder mask to expose the ground plane underneath. Just a small bit to get solder in.

Or use a normal through hole resistor like exxos did.

Tool.jpg