ALM Busy Circuits Mega-Tang

Name: Mega-Tang
Brand: ALM Busy Circuits

4-channel live performance VCA mixer with effects send

16 HP Eurorack module

The Mega-Tang is a 4-channel linear VCA and stereo mixer designed for live Eurorack performance, offering per-channel level, send, pan, and mute control with a clean and transparent signal path inherited from the Tangle Quartet VCA. It provides a mono effects send with stereo return, individual pre-mix VCA outputs for monitoring and cueing, and soft-latching mute buttons with LED indicators, making it an expressive and practical performance mixer.

Features

4-channel linear VCA with clean, transparent signal path based on the Tangle Quartet VCA
Per-channel manual level control knobs doubling as CV attenuators when CV is patched
Per-channel Level CV inputs with LED level indicators
Per-channel send controls for routing signal to the mono effects send output
Mono effects send output with stereo effects return (AC coupled)
Left effects return normalled to Right for mono return signals
Per-channel manual pan controls for stereo placement in the mix
Per-channel soft-latching mute buttons with LED indicators
Soft-close mute circuit to minimize clicks during live muting
Individual per-channel VCA outputs that remove the channel from the main mix (post-VCA, pre-send/pan/mute)
Stereo mix outputs for the final mixed signal
All signal inputs and outputs are DC coupled (Euro level) except effects return which is AC coupled

Controls & Jacks (37)

In 1— Audio or CV signal input for channel 1. DC coupled.
In 2— Audio or CV signal input for channel 2. DC coupled.
In 3— Audio or CV signal input for channel 3. DC coupled.
In 4— Audio or CV signal input for channel 4. DC coupled.
Send Output— Mono effects send output combining all four channels send signals.
Return L (m)— Stereo effect return left input. AC coupled. Normaled to right input for mono return signals.
Channel 1 Level CV Input— CV level control input for channel 1 VCA. LED represents control level.
Channel 2 Level CV Input— CV level control input for channel 2 VCA. LED represents control level.
Channel 3 Level CV Input— CV level control input for channel 3 VCA. LED represents control level.
Channel 4 Level CV Input— CV level control input for channel 4 VCA. LED represents control level.
Return R— Stereo effect return right input. AC coupled.
Channel 1 Send Control— Controls the amount of channel 1 post-level signal mixed to the effects send output.
Channel 2 Send Control— Controls the amount of channel 2 post-level signal mixed to the effects send output.
Channel 3 Send Control— Controls the amount of channel 3 post-level signal mixed to the effects send output.
Channel 4 Send Control— Controls the amount of channel 4 post-level signal mixed to the effects send output.
Out 4— Individual output for channel 4. Breaks signal out post-VCA, before sends, pans and mutes. Patching removes channel from main mix.
Channel 1 Pan Control— Pans channel 1 signal between left and right stereo mix outputs.
Channel 2 Pan Control— Pans channel 2 signal between left and right stereo mix outputs.
Channel 3 Pan Control— Pans channel 3 signal between left and right stereo mix outputs.
Channel 4 Pan Control— Pans channel 4 signal between left and right stereo mix outputs.
Out 3— Individual output for channel 3. Breaks signal out post-VCA, before sends, pans and mutes. Patching removes channel from main mix.
Out 2— Individual output for channel 2. Breaks signal out post-VCA, before sends, pans and mutes. Patching removes channel from main mix.
Channel 1 Level Control— Sets the output level of channel 1 VCA. Without CV patched, acts as a volume knob. With CV patched to Level CV Input, acts as an attenuator
Channel 2 Level Control— Sets the output level of channel 2 VCA. Without CV patched, acts as a volume knob. With CV patched to Level CV Input, acts as an attenuator
Channel 3 Level Control— Sets the output level of channel 3 VCA. Without CV patched, acts as a volume knob. With CV patched to Level CV Input, acts as an attenuator
Channel 4 Level Control— Sets the output level of channel 4 VCA. Without CV patched, acts as a volume knob. With CV patched to Level CV Input, acts as an attenuator
Out 1— Individual output for channel 1. Breaks signal out post-VCA, before sends, pans and mutes. Patching removes channel from main mix.
Channel 1 Level LED— Indicates channel 1 signal level and CV activity.
Channel 2 Level LED— Indicates channel 2 signal level and CV activity.
Channel 3 Level LED— Indicates channel 3 signal level and CV activity.
Channel 4 Level LED— Indicates channel 4 signal level and CV activity.
Channel 1 Mute— Latching button that mutes channel 1 in the main stereo mix. Soft-close circuit helps avoid clicks. LED lights when muted.
Channel 2 Mute— Latching button that mutes channel 2 in the main stereo mix. Soft-close circuit helps avoid clicks. LED lights when muted.
Channel 3 Mute— Latching button that mutes channel 3 in the main stereo mix. Soft-close circuit helps avoid clicks. LED lights when muted.
Channel 4 Mute— Latching button that mutes channel 4 in the main stereo mix. Soft-close circuit helps avoid clicks. LED lights when muted.
Mix Out L— Final stereo mix output left channel.
Mix Out R— Final stereo mix output right channel.

How-To Guides

Basic 4-Channel Stereo Mix
CV-Controlled VCA per Channel
Send/Return Effects Loop
Live Mute Performance
Cue and Pre-Mix Monitoring
4-Channel DC-Coupled CV Mixer
Manual Pan Automation Performance
Single Channel VCA Utility
Four-Voice Polyphonic Dynamics

Explore the interactive Mega-Tang panel on BleepDex — tap any control to learn what it does.