endorphin-es-queen-of-pentacles

Endorphin.es Queen of Pentacles

Hybrid analog and sample drum machine for the dance floor

30 HP Eurorack module

The Queen of Pentacles is a 7-voice hybrid drum synthesizer combining three analog drum voices (bass drum, snare drum, hand clap) with four sample-based voices loaded from microSD, all feeding into a master filter, VCA, and a 16-effect stereo processor. It is specifically tuned for EDM and Techno, delivering punchy, dance-floor-ready percussion with deep CV control, per-voice effect routing, and zero-latency sample playback.

Features

  • 7-voice hybrid drum kit: 3 analog voices (BD, SD, CP) + 4 sample-based voices (S1-S4)
  • Zero-latency sample playback directly from microSD card (latency under 45-50 microseconds)
  • Hybrid analog sound generation: 3x band-limited LSRF binary noise generators with spectrum animation injected into discrete analog circuits
  • On-board 16-effect processor in two banks of 8: Airways (ambient) and Darkwaves (drum-oriented)
  • Auxiliary input with adjustable level (modular or line level) that can be routed into the effect processor
  • Firmware update over audio via AUX IN
  • Master isolator-style LP/HP zero-delay feedback state variable filter (Throttle/Flaps)
  • VCA with volume knob and CV input; saturator booster above 2 o'clock
  • Per-voice enable/mute switches affecting only the final stereo mix outputs
  • Separate individual outputs for BD, SD, CP, S1/S2, S3/S4; plugging a cable subtracts that voice from the final mix
  • Balanced stereo final outputs (Audio Out 1 and Audio Out 2), approximately modular level +/-5V
  • Effect CV scan input: bipolar -5V to +5V scans across all 16 effects

Controls & Jacks (60)

  • vca
  • hold for rolls
  • s1-s4
  • sd
  • rd/cy
  • ac-cent
  • cp
  • hp
  • CV
  • fx
  • volume/boost
  • ch
  • rd
  • oh
  • CV
  • Tap— TAP button for tap tempo on delays, spring plucking, effect secondary function entry, or freezer enable
  • lp
  • s2
  • in
  • bd
  • s3
  • Cabin Pressure— Effect dry/wet control - fully CCW is dry, fully CW is wet (100% effect)
  • BD Tail— Bass drum tail decay amount - VCA envelope decay amount
  • s3/4
  • cp
  • s1
  • cabin
  • hh
  • cy
  • hh
  • ac-cent
  • drive
  • Spoiler— Noise crunchiness - adjusts noise samplerate and crunchiness for kick, snare, and clap
  • AUX In Level— Auxiliary input level adjustment - CCW for modular level, CW for line level
  • off
  • bd
  • city
  • cv in
  • in
  • sd
  • +rolls
  • in
  • in
  • level
  • cv in
  • Type— Effect type selection - short press cycles through 8 effects, long hold enables secondary mode or all effects
  • Throttle— Master filter cutoff control - bipolar master LP/HP zero-delay feedback state variable filter
  • in
  • in
  • in
  • ac-cent
  • out 2
  • 0...+5v
  • out 1
  • TUNE
  • in
  • in
  • in
  • cp
  • in

How-To Guides

  • Save S1-S4 Pitch and Decay Settings to Bank
  • Load a Different Sample Bank
  • Rescan microSD Card for New Samples
  • Factory Reset All Effect Parameters
  • Update Firmware via Audio
  • Punchy Deep Techno Kick
  • Snappy Snare with Gated Reverb
  • Infinite Shimmer Reverb Pad
  • Live Drum Freeze and Glitch
  • CV-Morphing Through All 16 Effects
  • Spring Reverb Live Pluck Performance
  • Master Filter Sweep Performance

Explore the interactive Queen of Pentacles panel on BleepDex — tap any control to learn what it does.

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