Racks and Chains

What Is a Rack?

A rack is a container. That’s it. It holds one or more devices — instruments, effects, or both — and presents them as a single unit.

Why is that useful? Because sometimes one effect isn’t enough. You might want an EQ feeding into a compressor feeding into a saturator, all saved as a single reusable preset. Or you might want three different synths layered together, triggered by the same MIDI note, with one knob that controls the filter on all three simultaneously. Or you might want a drum kit where each pad has its own sample, its own effects chain, and its own volume control — all in one device.

Racks do all of this. They come in three types:

• Audio Effect Rack — Contains audio effects. Used on audio tracks or after an instrument.
• Instrument Rack — Contains instruments (and optionally effects after them). Used on MIDI tracks.
• Drum Rack — A specialized Instrument Rack designed for drum kits and pad-based triggering.

Chains: The Core Concept

Inside every rack, you’ll find one or more chains. A chain is a signal path — a sequence of devices that audio (or MIDI) passes through from left to right. If a rack has one chain, it behaves like a simple device group. But when a rack has multiple chains, things get interesting: those chains run in parallel.

This is the key insight. In a normal device chain on a track, sound passes through each effect in series — one after another, left to right. In a rack with multiple chains, the incoming signal is split and sent through all chains simultaneously. The outputs are then mixed back together.

Serial vs. Parallel

Serial: Sound goes through Effect A, then the output of A goes into Effect B. This is how a normal device chain works.

Parallel: Sound is split — one copy goes through Effect A, another copy goes through Effect B — and the results are blended together. This is what a rack with two chains does.

Why does this matter? Parallel processing preserves the character of the original signal while adding the color of the effect on top. This is why professional engineers often compress or distort a signal in parallel — you get the punch or grit of the processed signal mixed with the clarity of the dry signal. The difference can be dramatic.

To create a parallel chain: open the Chain List in a rack (click the small icon to the left of the device), then right-click and choose Create Chain, or drag a new device into the chain area.

Audio Effect Racks

An Audio Effect Rack holds a collection of audio effects. You can create one by:

• Selecting multiple effects on a track and pressing ⌘+G (Ctrl+G) to group them.
• Dragging an Audio Effect Rack from the Browser.
• Right-clicking a device and choosing Group.

Once grouped, the rack appears as a single device with a compact header. Click the arrow to expand it and see what’s inside. You can add chains, reorder devices within chains, and build complex processing setups that are saved and recalled as a single preset.

Many of the best-sounding presets in Live’s Browser are actually Audio Effect Racks with multiple chains running in parallel. Load one from the Audio Effects > Audio Effect Rack category, expand it, and study how it’s built. This is one of the best ways to learn rack architecture.

Instrument Racks

Instrument Racks do for instruments what Audio Effect Racks do for effects. They let you combine multiple instruments into a single device — layering a pad synth with a bass, or stacking three different piano samples with different velocity responses.

When you load a preset from the Sounds category in the Browser and it sounds richer than any single instrument should, it’s almost certainly an Instrument Rack under the hood. The .adg files in your Browser are rack presets (as opposed to .adv files, which are single-device presets).

Each chain in an Instrument Rack receives the same MIDI input. This means every instrument in the rack plays the same notes — unless you use zones to restrict which notes, velocities, or chain-select values each chain responds to.

Chain Zones

Zones are where racks get genuinely powerful. Each chain has three types of zones:

• Key Zone — Restricts which MIDI notes the chain responds to. Use this for keyboard splits: bass synth on the left hand, lead on the right.
• Velocity Zone — Restricts which velocity levels trigger the chain. Play softly and hear one instrument; play hard and hear another. This is how realistic multisampled instruments work.
• Chain Select Zone — Maps chains to a horizontal selector that you can automate or map to a knob. Slide the chain selector and different chains activate. This is wildly creative — you can morph between entirely different instruments or effect setups with a single control.

To access zones, show the Chain List and click the small Key, Vel, or Chain buttons above it. Drag the zone boundaries to define ranges, and overlap zones to create crossfades between chains.

Drum Racks

Drum Racks are the most specialized rack type — and for beat-makers, the most important. They present a grid of 128 pads, each mapped to a MIDI note, each capable of holding its own instrument, effects, and routing.

Building a Kit

The basic workflow:

1. Load an empty Drum Rack from the Browser onto a MIDI track.
2. Drag samples from the Browser onto individual pads. Each sample automatically loads into a Simpler instance.
3. Adjust each pad’s Simpler settings: extend the Release so drum hits play fully, increase Velocity sensitivity for dynamic response, and set Voices to 1 for monophonic playback (one hit at a time per pad, like real drums).

You can also load full instruments onto pads — Operator for a synth snare, Analog for a bass drum, even another rack. Each pad is its own little world.

Choke Groups

Assign two or more pads to the same Choke group and triggering one will cut off the others — essential for open/closed hi-hat pairs. Find the Choke setting in the pad’s chain I/O section.

Drum Rack Returns

Unlike other racks, Drum Racks have their own internal Return chains. Click the R button in the rack’s view selector to reveal them. These work like return tracks in the mixer: drop a reverb or delay on a return, then use the Send knobs on each pad to blend in the effect. This lets multiple pads share effects without duplicating devices.

Extracting Chains

Need to give a single drum sound its own track? Drag the chain from the Drum Rack to an empty space in the mixer. Live creates a new MIDI track with that pad’s device chain and duplicates the relevant MIDI notes from any clips. Useful for detailed mixing.

Macros

Here’s where racks become instruments in their own right. Macros are assignable knobs on the front panel of any rack. Each macro can control one or more parameters from any device inside the rack — across any chain.

To map a parameter to a macro:

1. Click the Map button on the rack.
2. Click a parameter inside the rack (it will glow green to indicate it’s mappable).
3. Click the Map button on the macro knob you want to assign it to.
4. Adjust the Min and Max values to define the range.

The result: one knob that might simultaneously sweep a filter, increase a reverb send, and reduce distortion drive. This is how the best rack presets in the Browser create those “one-knob-does-everything” effects.

A few macro tips:

• You can map multiple parameters to a single macro — that’s the whole point.
• You cannot map one parameter to multiple macros.
• Rename your macros (right-click > Rename) so you remember what they do.
• Macros are prime candidates for MIDI mapping to hardware controllers (see MIDI Mapping and Controllers).

Saving and Reusing Racks

Any rack can be saved as a preset to your User Library. Right-click the rack’s title bar and choose Save Preset, or drag the rack directly to the Browser. Saved racks appear as .adg files and can be loaded onto any track in any project.

This is how you build your personal toolkit over time. A vocal chain you love? Save it as a rack. A drum kit you’ve spent hours tweaking? Save it. A creative effects setup that does something bizarre and wonderful? Save it. Your User Library should grow with you.

Default Presets

You can also set a default rack that loads automatically. For example, if you always want dropped samples to load into Simpler with specific settings (longer release, velocity response, mono voices), save that Simpler configuration to your Defaults folder:

User Library/Defaults/Dropping Samples/On Drum Rack/

Every future sample dropped onto a Drum Rack pad will use your settings instead of Live’s defaults.

Keyboard Shortcuts