Hyperscale301 is a large, ever-growing collection of stereo custom units for the ER-301 by mudlogger — mostly self-generating/semi-random drum, percussion, granular and synth voices with deliberately minimal controls (usually a handful of CV-able sliders). You steer the ship rather than program it note-by-note. As of v1.6 the pack contains 67 individual .pkg units.

More demos: FuTrYFDV6Zs, Zbcc6PW59So, EXbhVVzUnag (Static + Loss unit).

Requirements

• Minimum ER-301 firmware v0.6.15 (odevices/er-301 releases) — v0.6.14 and earlier cannot load the samples bundled in these packages.
• Set the ER-301 to 48kHz / 128 samples per block in system settings.
• These are stereo units: link channel 1 + channel 2 before loading one (hold the Ch 1 button while pressing Ch 2 — the "linked" LED lights up).
• A number of units additionally depend on other hub packages: Accents, Band Limited Oscillators, Filter Delays, Lojik, Sloop and Strike. Install these first.

Downloads

Because a full release (all 67 .pkg files zipped together) is several hundred megabytes — far too large to host as static files on this hub — downloads are not listed below. Use the "Latest GitHub release" button at the top of this page (it links straight to the current hyperscale301.vX.X.zip asset on GitHub), or browse all releases directly, including the original er301 tag if you want an older/smaller starting point.

Installation

1. Download the latest hyperscale301 release .zip.
2. Unzip it — you'll get one .pkg file per unit.
3. Copy the .pkg files you want to ER301/packages on the SD card.
4. On the ER-301: flip the left switch to Admin → Package Manager.
5. Highlight and install each .pkg individually.

Units

Most units are single-purpose generative voices with little to no public documentation beyond their name and the demo videos above — this hub will get more per-unit detail as it's written up. What's known from the release notes so far:

Unit	Notes
bongo rom	6-voice triggerable bongos with pitch randomizer.
endless bongo	Same as bongo rom, plus an internal phase sequencer.
marimba rom	6-voice triggerable marimbas with pitch randomizer.
endless marimba	Marimba rom with an internal phase sequencer.
chance	Probability sliders shape the drum pattern.
dorian	2 self-generating, semi-random FM synths in the Dorian scale.
noise merchant	2 Mangrove-style oscillators through a filter, in an FM feedback loop — harsh noise territory.
r+r25	2 pinged bandpass filters — "you steer the ship".
ultra violet	Wavetable oscillator through rbeny's Ultraviolet package.
edev	4-voice glitch drum sample player: 4 euclidean sequencers, random clock, per-voice probability, spread delay.
edigi	4-voice FM drum samples with 4 euclidean sequencers, optional clocked random clock, random sample, reverb.
emono	Like edev, mono-flavored drum voices with the same euclidean/clock/delay setup.
monolith	4-voice stereo glitch drum sample player: 4 euclidean sequencers, random clock, per-voice probability, clocked delay.
fragments	Granular stretch through a stereo delay and reverb, with 2 internal LFOs and randomization.
jitter	Same granular-stretch/delay/reverb/LFO approach as fragments.
hyper301	Grain-stretching unit (part of the pack's namesake "hyperscale" granular voices).
piano esque	Random atonal piano samples through a looper.
puls	Pulsar synthesis: sine + fast envelope, 36dB HP filter, stereo delay and reverb.
twisted	Scannable wavetable synth with internal LFO, low-pass gate, tanh gain, 12dB BP filter, delay and reverb.
gaston	Pulsar synthesis with a ping-pong clocked delay.

The remaining units (bend, bento box, big, bongo phase, bottles, coastal, dialled in, ezil / ezil rev 2, gran, gritch25, grove / grove rev 2, hamming, hyper scale, kalimba hell, krystal kastles, luthier, lutq, manq, mantis, mesh, metab, ninja, ota / rev 2 / rev 3 / rev 4, plaidium, pole, rescale, ria, ringing rocks, slaughter house, speak and hell, spook, sweet spot, temple + rain, temple tantrum, tight rope, tritone / tritone rev 2, tube, tunnel vision, unskool, velouria, vink) don't have a published description yet — check the demo videos linked above, or the release notes for the version they were added in.

Extra miscellaneous packages by other authors that pair with this pack are collected separately at er301-misc-units-by-others.