search

TomWhitwell / RadioMusic

Virtual Radio module for Eurorack
325 stars 91 forks source link

Reset CV not working, Start CV behaving weird. Also sometimes glitching. #186

Open finnglink opened 1 year ago

finnglink commented 1 year ago

Picking up on #183 here, I've taken over from @PeterSpiegel.

I've yet again inspected the board. One of the electrolytic caps was the wrong way around. Fixed that, and reflowed all the joints. The CV ins are now mostly working. I've also refreshed the latest firmware with a default settings file.

Also, sometimes the sounds seem to glitch out when I feed a CV in there. They still somewhat respond to pots and CV, but can only go back to normal on a power cycle.

Any ideas on where to look next? Could the TL074 be faulty (causing the glitch-hang-up and weird CV behavior), or are some of the Teensys inputs toast?

Best, Finn

finnglink commented 1 year ago

This is what I'm at right now: tempImage0wf9l7 tempImageMp3uVH tempImagejZ2kyr

finnglink commented 1 year ago

Update 2022.10.24 / 15:45:

Swapping the TL074 seems to have fixed the sample jumping on higher start-cv voltages.

With a little code-snippet: digitalWrite(11, digitalRead(9)); I could verify, that the Reset CV is fully functional, and that it seems to be a software problem.

I've also tried a newly formatted (FAT on Mac, I can only choose between ExFAT and FAT) 32GB SD card with just two samples doesn't change anything. I'm currently on the 2017 Firmware (Radio_Music_2017.2.hex). The older version RadioMusic1_1.cpp.hex doesn't work at all. Without an SD card I get the four lights blinking at the same time, with the card inserted it's completely dead.

CallPhysical commented 1 year ago

Did you ever get it working? I just bought one used and it has the same rev board as yours, but there are two extra resistors that have been added on the back of boards as a fix for something. I wonder if yours needs the same.

finnglink commented 1 year ago

Did you ever get it working? I just bought one used and it has the same rev board as yours, but there are two extra resistors that have been added on the back of boards as a fix for something. I wonder if yours needs the same.

I did not, I gave up haha. I don't really have the time for DIY at the moment, so I passed it on to someone from our Discord. Would you take a picture of the resistors I can share with them?

Thonk-Steve commented 1 year ago

The resistors thing is most likely to resolve a distortion issue that some people would have when the module is left on for a long time.

It sounds to me like you possibly have a short circuit that's feeding into the CV system somewhere, did you get your kit from Thonk?

On Tue, 31 Jan 2023, 09:31 finnglink, @.***> wrote:

Did you ever get it working? I just bought one used and it has the same rev board as yours, but there are two extra resistors that have been added on the back of boards as a fix for something. I wonder if yours needs the same.

I did not, I gave up haha. I don't really have the time for DIY at the moment, so I passed it on to someone from our Discord. Would you take a picture of the resistors I can share with them?

— Reply to this email directly, view it on GitHub https://github.com/TomWhitwell/RadioMusic/issues/186#issuecomment-1410035365, or unsubscribe https://github.com/notifications/unsubscribe-auth/AAKXH6FVZNFYBS7WSAN7KVDWVDLXNANCNFSM6AAAAAARM4VDYE . You are receiving this because you are subscribed to this thread.Message ID: @.***>

finnglink commented 1 year ago

It sounds to me like you possibly have a short circuit that's feeding into the CV system somewhere, did you get your kit from Thonk? …

Thanks Steve! I bought it as damaged / failed DIY, I don't know where it's from originally.