Xcelon

Boredbrain Music 48HP
MIXER I/O UTILITY

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Six-channel true stereo mixer with dual-mono crossfade, dual FX sends and returns, selectable A/B mix busses, VU metering and expansion ports.

Patch Ideas · 5

★ Stereo drum desk
kick and snare on channel 1 and 2 · hats on 3 · percussion on 4 · bus A goes dry · bus B gets reverb return · the mixer keeps the kit wide without sacrificing level control.
▸ Show diagram
Patch diagramPatch diagram with 7 modules and 10 connections. Signals: 10 audio.XcelonDrum 1Drum 2Drum 3Drum 4ReverbOutputCh 1: drum 1Ch 2: drum 2Ch 3: drum 3Ch 4: drum 4INPUT 1 LaudioINPUT 2 LaudioINPUT 3 LaudioINPUT 4 LaudioFX RETURN 1 LaudioFX RETURN 1 RaudioFX SEND 1 LaudioFX SEND 1 RaudioMIX OUT A LaudioMIX OUT A RaudioOutaudioOutaudioOutaudioOutaudioInaudioOut LaudioOut RaudioLaudioRaudioaudio
★ Wet send rack
synth voice into channel 5 · FX1 to delay · FX2 to reverb · channel stays dry on bus A while bus B collects the wet returns for performance mixing.
▸ Show diagram
Patch diagramPatch diagram with 5 modules and 9 connections. Modules: Xcelon, VCO, Delay, Reverb, Output. Signals: 9 audio.XcelonVCODelayReverbOutputCh 5: dry voiceFX1: delay sendFX2: reverb sendINPUT 5 LaudioFX RETURN 1 LaudioFX RETURN 1 RaudioFX RETURN 2 LaudioFX RETURN 2 RaudioFX SEND 1 LaudioFX SEND 2 LaudioMIX OUT A LaudioMIX OUT A RaudioOutaudioInaudioOut LaudioOut RaudioInaudioOut LaudioOut RaudioLaudioRaudioaudio
Dual-mono crossfade
two mono voices share one channel in XFADE mode · BAL acts as a crossfader instead of a pan knob · ideal for swapping between two basses or two drum layers on one fader.
▸ Show diagram
Patch diagramPatch diagram with 4 modules and 4 connections. Modules: Xcelon, VCO A, VCO B, Output. Signals: 4 audio.XcelonVCO AVCO BOutputCh 2: XFADE onCh 2: dual mono pairINPUT 2 LaudioINPUT 2 RaudioMIX OUT A LaudioMIX OUT A RaudioOutaudioOutaudioLaudioRaudioaudio
Performance bus split
channels 1-3 feed mix A while 4-6 feed mix B · both buses stay available for external processing or cue monitoring · AB switches let the split move live without repatching.
▸ Show diagram
Patch diagramPatch diagram with 8 modules and 10 connections. Signals: 10 audio.XcelonVCO 1VCO 2VCO 3VCO 4VCO 5VCO 6OutputCh 1-3: bus ACh 4-6: bus BINPUT 1 LaudioINPUT 2 LaudioINPUT 3 LaudioINPUT 4 LaudioINPUT 5 LaudioINPUT 6 LaudioMIX OUT A LaudioMIX OUT A RaudioMIX OUT B LaudioMIX OUT B RaudioOutaudioOutaudioOutaudioOutaudioOutaudioOutaudioA LaudioA RaudioB LaudioB Raudioaudio
★ CV-controlled blend desk
use VOL CV on a few channels like VCAs · pan with BAL CV from an envelope follower or slow LFO · Xcelon becomes a playable modulation surface rather than a static submixer.
▸ Show diagram
Patch diagramPatch diagram with 5 modules and 6 connections. Modules: Xcelon, Envelope, LFO, VCO, Output. Signals: 4 audio, 2 cv.XcelonEnvelopeLFOVCOOutputCh 1: VOL CV onCh 2: BAL CV onVOL CV 1cvBAL CV 2cvINPUT 1 LaudioINPUT 2 LaudioMIX OUT A LaudioMIX OUT A RaudioOutcvOutcvOutaudioLaudioRaudioaudiocv

Behaviors

Stereo or dual-mono channels patch one or two sources into a channel pair

A mono source in the left jack is normalled to the right jack, and the XFADE button turns the pair into a mono crossfader.

A/B bus assignment move the AB switch

Each channel can be routed to mix bus A, mix bus B or both, which makes bus splits and parallel processing simple.

Pre/post send shaping adjust FX1 and FX2

The two send knobs feed shared stereo effects buses, with FX1 optionally configurable pre-fader by jumper.

VCA style volume mode configure the volume jumper

Volume CV can behave like a proper VCA instead of a summed modulation input.

Clickless mute press MUTE

The mute circuit uses a VCA-based switch so changes do not click or pop.

VU metering drive any channel

Each channel has a 5-segment VU meter that responds to the stereo signal level.

Line and modular gain staging turn GAIN

The preamp gain can bring modular signals up to line level or add a little push for saturated mix buses.

Expandable mix architecture rear expansion ports

The rear ports support direct outputs and channel expanders for larger rigs.

Controls

Channels 1-6 Channel 1-6 GAIN Boosts each stereo channel or line source before the mix stage.
up to +15 dB
Channels 1-6 Channel 1-6 BAL Pans a stereo pair or balances a dual-mono pair with a pan-law curve.
-5V to +5V CV range
Channels 1-6 Channel 1-6 XFADE Engages dual-mono crossfade mode for the channel pair.
blue button
Channels 1-6 Channel 1-6 VOL Sets channel level with a long-travel fader and LED response.
linear fader
Channels 1-6 Channel 1-6 MUTE Clickless mute with VCA-based switching.
red button
Channels 1-6 Channel 1-6 FX1 Sets send level to the first stereo FX bus.
post-fader by default
Channels 1-6 Channel 1-6 FX2 Sets send level to the second stereo FX bus.
post-fader by default
Channels 1-6 Channel 1-6 AB Assigns the channel to mix bus A, mix bus B or both.
left / center / right
FX returns FX RETURN 1 LEVEL Controls the first stereo return path into the mixer.
shared return level
FX returns FX RETURN 2 LEVEL Controls the second stereo return path into the mixer.
shared return level
FX returns FX RETURN AB Assigns the return to mix bus A, mix bus B or both.
bus selector

I/O

IN · 7

  • INPUT 1-6 L/R eurorack audio or line level AUDIO
    Six stereo or dual-mono channel input pairs with normalled right jacks.
  • VOL CV 1-6 0V to +5V CV
    Per-channel volume control voltages.
  • BAL CV 1-6 -5V to +5V CV
    Per-channel balance or crossfade control voltages.
  • FX1 CV 1-6 0V to +5V CV
    Per-channel first send control voltages.
  • FX2 CV 1-6 0V to +5V CV
    Per-channel second send control voltages.
  • FX RETURN 1 L/R
    First stereo FX return pair.
  • FX RETURN 2 L/R
    Second stereo FX return pair.

OUT · 4

  • MIX OUT A L/R
    Stereo main mix bus A.
  • MIX OUT B L/R
    Stereo main mix bus B.
  • FX SEND 1 L/R
    First stereo effects send bus.
  • FX SEND 2 L/R
    Second stereo effects send bus.