[$18] DIY eurorack modular synth 山景DSP FX Pitch Shifter & Reverb | BP1032 based

video upload by HAGIWO

"My 84th original eurorack modular synth DIY projects.
BP1032 DSP Reverb module from China based FX module.
Effect types and parameters can be changed using PC software called APCWrokbench.

working documents (schematics)
https://note.com/solder_state/n/nba86...

Sound test videos for other effects and parameter changes (patreon)
https://www.patreon.com/posts/shan-ji...

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Repository of HAGIWO's DIY Modular Synth
https://note.com/solder_state/n/n54e0..."

Module description, Google translated:

Background
The 84th work of my own modular synth.
There are many suspicious circuit modules on sale on Aliexpress whose purpose is unknown.
Depending on your idea, you can easily create original modules at low cost.
This time, I planned to create a Pitch Shifter using such a suspicious and attractive Chinese module.

Pitch shifter
A pitch shifter is a type of effect that raises or lowers the frequency of the input sound. By layering 5th or octave sounds, you can create a thick sound.
There are also several Pitch shifter modules on the market for modular synths.

Specifications of the work
Eurorack standard 3U 8HP size
Power supply: 50mA (+12V), 10mA (-12V)

Pitch shifter module using BP1032 DSP IC manufactured by Mountain View Silicon, a Chinese semiconductor manufacturer.
The amount of pitch shift is fixed. In my case, I use it at a perfect fifth (5th).

DRY POT: Adjusts the DRY volume
WET POT: Adjusts the WET volume
INPUT LEVEL: Adjusts the input signal. Adjusts the input level to accommodate ±5V of modular synth sound and general line level.
OUTPUT LEVEL: Adjusts the output volume
Signal IN: Audio input
L Out: Left output. Not used with Pitch shift, but valid when the Reverb effect is selected.
R Out: Right output. Not used with Pitch shift, but valid when the Reverb effect is selected.
The biggest drawback of this module is that it does not have an interface for the applied effects or effect parameters on the front panel.
You can adjust the effects and parameters by connecting it to a PC via USB C.
In addition to being a pitch shifter, it can also be used as a reverb or delay depending on the settings.
ACPWorkbench
To switch effects, use PC software called ACPWorkbench.
This software is made in China and is of questionable origin, so use at your own risk. My PC's antivirus software did not detect any viruses, but I don't know if it's safe.