After getting my feet wet with some west coast synthesis custom units, I’ve gone back to my usual realm of sonic exploration, which is making early rave inspired dance music.
Currently I’ve got the JP-80XX Super Saw emulated very closely, and I’m just finishing up the Alpha Juno PWM saw waveform which is used in the (in)famous Hoover/Mentasm sound.
Here’s a demo of the super saw sound running a simple sequence. No post processing.
Starts with single oscillator, fades to full mix with no detune, detune sweep from 0-1, then just some messing with parameters.
For the Super Saw unit, I relied heavily on this thesis, which has an extremely thorough empirical analysis of the synthesis of the Super Saw on the original Roland JP-80XX synths.
Converting the plotted curves for the Mix and Detune levels to a useable form was quite a process. I traced the curves as SVGs in Inkscape, loaded them into a program called Rabiscoscopio to convert them to WAV files, and then used Audacity to scale/offset them.
These two WAV files were then loaded into Sample Scanner units to work as transfer functions for the “Mix” and “Detune” controls. The sound of this unit is one of the closest approximations of the original Super Saw I’ve ever heard, and the 301 is much more portable than a massive JP-8080 or JP-8000.
The Alpha Juno PWM Saw will be uploaded when I get a chance to A/B it with my real Alpha Juno. I can’t seem to get the phase of the PWM to match up with the Sawtooth very well, and I’d like to see if it makes a noticeable difference before posting it.
Hey, I have been trying to install these custom units with no luck. Can someone point me to a source where it explains the install/setup procedure. It would be very much appreciated and yes ,I have already used the search function but could not find the guide.
There is no installation procedure, rather you select the *.unit file and load the preset via the unit insertion screen:
In the Unit Insertion screen, press S3 to enter the file browser:
Navigate to the location on the SD card where you copied the *.unit file, highlight it and press ENTER:
The newly loaded and populated custom unit:
If there are additional requirements specific to the custom unit (such as samples that need to be placed in specific places) then the custom unit designer will typically include those instructions in the post or a readme.txt file.
Thanks for that speedy reply! I attempted to load it and had the samples as specified but I wasn’t seeing that screen…I’ll try again tonight and hopefully it was just a step I missed…by the way is a firmware update necessary for these customs units if they were created on a previous fw?
this may point to a bigger 301 knowledge gap i have, but when i got around to trying to work the super saw into a patch with other stuff last night, i found that it was off by about 3 semitones from the 1v/oct i was feeding it. that seems weird… it’s not tuned to C?
i also tried inserting an offset unit after my 1v/oct signal, but in editing the control on the offset unit, it did not present voltage as a display unit. I tried setting it to .25 (3 semitones) and it swept the note value waaaaaay up.