preenfm Forum
PreenFM => preenfm2 and preenfm3 => Topic started by: UltraBlack on April 10, 2023, 12:25:07 PM
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Hey there,
I'm planning to get a PreenFM3 once they come back in stock on Van-Daal. Since it has six stereo outputs, I need to get a new way to mix that together and thought of a passive mixer (because it's cheap)
Does anyone know how severe the volume drop is with a 10k resistor on both channels? I'm wondering, if it is even worth dealing with the hassle of building one if the synth is way too silent afterwards.
Regards
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you don't have to use the additonal outputs if you don't want to. you can route everything in stereo
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oh well that's good to know (The documentation is a bit weird imo. Hardware information is among the build instructions for whatever reason)
Now I'm wondering; Are the timbres stereo? I thought each timbre would get a stereo output, but why am I being told (in another forum and kinda in the documentation) that there are six mono outs? Even the jack sockets are stereo.
I do need a mixer regardless though, that's why I'm asking how it's volume behaves with a 10k resistor.
Edit: I understand the output config now. Found it in the wiki. Yet again in a completely different place. Man this needs a rework
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Isn’t it 6 instruments across 16 voices. Instruments can be mono or stereo and can be summed and routed to any of three stereo output pairs or 6 mono outputs?
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instruments can be routed either mono or stereo to any of the outputs, also, each carrier can also be panned left or right.
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I agree that's a bit confusing and not very easy to explain :)
Hardware :
The preenfm3 has 3 setereo DACs that are wired to 6 audio jacks (mono).
There's a (mecanical) trick at the jack level, that redirects jack 1,3,5 to jacks 2,4,6 if you don't insert anything in 1,3,5.
In this case jacks 2,4,6 (or only one of them) become stereo.
That means that instead of 6 mono jack you can use 3 stereo jacks 2,4,6.
At the end you still have 6 mono outputs.
Firmware :
Each of the 6 pfm3 instruments have a Stereo output. Instruments can be routed to ANY of the jacks.
- only one jack 1,2,3,4,5,6. Instruments will be then converted to mono.
- regular usage is using 2 jacks : 12, 34 or 56 for stereo output.
Hope that makes sens.
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That cleared up a lot, thank you!
One more thing: I noticed, that all jack sockets have contacts for a TRS jack. Would it be possible to output a stereo signal by outputting the mono signal to both available contacts?
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That cleared up a lot, thank you!
One more thing: I noticed, that all jack sockets have contacts for a TRS jack. Would it be possible to output a stereo signal by outputting the mono signal to both available contacts?
Haha looks like it was not that clear.
Don't insert anything in jack 1 = > jack 2 will be stereo for output 1/2
Don't insert anything in jack 3 = > jack 4 will be stereo for output 3/4
Don't insert anything in jack 5 = > jack 6 will be stereo for output 5/6
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Well I did in fact understand that. I was just hoping that it was somehow possible to ignore the switches inside the sockets. Thinking of it, it would probably not be possible on a hardware level, without changing how the device is connected internally