Audio Mixer & Routing

Audio Architecture

MultiMon features a professional audio system with:

• Separate audio tracks independent from video audio
• Per-track controls for volume, pan, mute, and solo
• Channel-to-channel routing (not just device-level)
• Preset system for saving routing configurations

This allows complex multi-output setups common in live events and installations.

Loading Audio Tracks

Drag and Drop

Add audio files by dragging them to the mixer panel:

1. Locate audio files in Windows Explorer
2. Drag files onto the Audio Mixer area
3. Multiple files can be dropped at once
4. Each file becomes a separate track

Supported Audio Formats

Format	Extension
MP3	.mp3
WAV	.wav
AIFF	.aiff
FLAC	.flac
Ogg Vorbis	.ogg
Windows Media	.wma
AAC	.m4a, .aac

Track Controls

Each audio track has individual controls:

Control	Function	Range
Volume slider	Track volume	0-100%
Pan knob	Left/Right balance	-1.0 (left) to 1.0 (right)
M button	Mute track	On/Off
S button	Solo track	On/Off

Volume Keyboard Shortcuts

Key	Action
↑ Up Arrow	Master volume +5%
↓ Down Arrow	Master volume -5%

Solo Behavior

When Solo (S) is enabled on a track:

• Only soloed tracks play
• Multiple tracks can be soloed simultaneously
• Un-solo all to return to normal mix

Custom Channel Routing

For advanced setups, MultiMon allows routing individual audio channels to specific output device channels.

Enabling Custom Routing

1. Open the Audio Routing dialog
2. Enable Custom Routing mode
3. Create routes between source and destination channels

Routing Modes

Mode	Behavior
Default	Standard stereo output with pan control
Custom	Only explicitly routed channels produce audio

Creating Routes

Each route connects:

• Source: Track + Channel (e.g., “Track 1 → Left”)
• Destination: Device + Channel (e.g., “Speakers → Front Right”)

Route properties:

• Gain: 0.0 to 2.0 (0% to 200% volume)
• Enabled: Toggle without deleting the route

Example Routes

Stereo to two devices:

Track 1 Left  → Device A Left
Track 1 Right → Device A Right
Track 1 Left  → Device B Left
Track 1 Right → Device B Right

Mono center to all outputs:

Track 1 Mono → Device A Left  (Gain: 0.7)
Track 1 Mono → Device A Right (Gain: 0.7)

Surround Sound Upmixing

MultiMon includes presets for upmixing stereo content to surround sound.

Stereo to 5.1 Surround

Source	Destination	Gain
Left	Front Left	1.0 (0 dB)
Right	Front Right	1.0 (0 dB)
Left + Right	Center	0.5 (-6 dB each)
Left + Right	LFE	0.25 (-12 dB each)
Left	Rear Left	0.7 (-3 dB)
Right	Rear Right	0.7 (-3 dB)

Stereo to 7.1 Surround

Extends 5.1 with additional routes:

• Left → Side Left (0.7 gain)
• Right → Side Right (0.7 gain)

Channel Positions

MultiMon recognizes standard channel positions:

Position	Typical Use
Front Left	Main left speaker
Front Right	Main right speaker
Center	Dialog/vocals
LFE	Subwoofer (Low Frequency Effects)
Rear Left	Surround left
Rear Right	Surround right
Side Left	7.1 side speaker
Side Right	7.1 side speaker

Routing Presets

Save and recall complex routing configurations.

Saving a Preset

1. Configure your routes
2. Click Save Preset
3. Enter a name for the preset
4. Preset saved to local storage

Loading a Preset

1. Click Load Preset
2. Select from saved presets
3. Routes applied immediately

Preset Storage

Presets are stored in:

%APPDATA%\Local\MultiMon\audio_routing_presets.json

You can export and import presets for backup or sharing.

Test Tones

Verify your routing with built-in test tones.

Using Test Tones

1. Open Audio Routing dialog
2. Select a channel to test
3. Click Test Tone
4. A tone plays through that specific channel

Verifying Setup

Use test tones to:

• Confirm which physical speaker corresponds to which channel
• Verify routing is correct
• Identify wiring issues

Common Scenarios

Scenario 1: Video Wall with Separate Audio Output

Video on monitors, audio to external speakers:

1. Set up Video Wall normally
2. Add audio track with your audio file
3. Route audio track to your speaker device

Scenario 2: Different Audio per Zone

Multiple areas with different content:

1. Add separate audio tracks for each zone
2. Route Track 1 → Zone A speakers
3. Route Track 2 → Zone B speakers
4. Control each zone’s volume independently

Scenario 3: Backup Audio Output

Redundant audio to two devices:

1. Create routes from track to Device A
2. Duplicate routes to Device B
3. If one device fails, other continues

Troubleshooting

No Audio Output

• Check Windows audio device is enabled
• Verify routes exist in Custom Routing mode
• Check track isn’t muted
• Confirm master volume isn’t zero

Wrong Channel Playing

• Use Test Tones to identify channels
• Verify route source and destination
• Check Windows speaker configuration matches physical setup

Audio Crackling/Distortion

• Lower track gains (total shouldn’t exceed 1.0)
• Check CPU usage isn’t maxed
• Verify audio device sample rate matches

Routes Not Saving

• Check write permissions to AppData folder
• Ensure preset name doesn’t contain special characters
• Try saving to a different preset name

Settings Storage

Audio settings are stored separately from projects:

File	Contents
audio_routing_settings.json	Custom routing enabled state
audio_routing_presets.json	All saved routing presets

Located in: %APPDATA%\Local\MultiMon\

Best Practices

1. Test before events - Verify all routes work with test tones
2. Save presets - Create presets for each venue/setup
3. Document routing - Keep notes on which channel goes where
4. Start simple - Begin with default mode, add custom routing as needed
5. Watch gains - Multiple routes to same channel can cause clipping

Keyboard Reference

Key	Action
↑	Master volume +5%
↓	Master volume -5%
Space	Play/Pause (all audio and video)
K	Pause and reset speed