SPL Meter
The SPL Meter module displays sound level data from any Mac audio input.Setup
- Open the Global Audio Settings and configure an input in the Measurement tab.
- Add the SPL Meter module to a tile and select that measurement input.
- Select your desired weighting (A, C, Z for flat, or C-A to show the difference between the two) and time weighting (Fast or Slow).
Features
- Calibration: Apply an offset (in dB) within Global Audio Settings to match a known reference meter.
- Averaging: Optionally average readings over a configurable window (in seconds) instead of showing the instantaneous level.
- History graph: Show a running graph of raw or averaged SPL, with configurable history length and graph height.
- Warning and alert thresholds: Set two dB thresholds with independent colors for normal, warning, and alert states, so a tile visibly changes color as levels climb.
- Bar meter: Optionally show a bar-style meter alongside the numeric readout, with separate upper and lower limits for the C-A comparison view.
- SPL Logging: Relay can record SPL data directly to CSV files when Live Mode is active, complete with a pulsing green indicator on your tiles. Logged exports can include raw dBFS and peak values in addition to the weighted SPL reading.
Real-Time Analyzer (RTA)
A visual analysis module that breaks down your audio inputs into discrete frequency bands in real-time.Setup
- Configure a measurement input in Global Audio Settings.
- Add the RTA module to a tile and select the input. You can add more than one input to the same RTA tile to compare sources directly.
Features
- Display Modes: Choose between standard bar graphs or a filled-curve display.
- Resolution: Six band resolutions from 1-octave (10 bands) up to 1/48-octave (478 bands), trading detail for a busier display: 1-octave, 1/3-octave (31 bands), 1/6-octave (61 bands), 1/12-octave (120 bands), 1/24-octave (240 bands), and 1/48-octave.
- Peak Hold: Enable peak-hold to track the highest frequency levels over time, with a configurable decay rate in dB per second.
- Time smoothing: Fast or Slow smoothing controls how quickly the display responds to level changes.
- Range: Set the visible frequency range and dB range independently, and apply A/C/Z/C-A weighting to the analysis.
- Warning colors: Optional threshold-based coloring, same as the SPL Meter.
- No-input state: Shows a clear “No audio input available” message instead of a blank tile when no input is selected.
Spectrograph
A scrolling waterfall view that visualizes audio frequency distributions over time, helping you spot persistent feedback frequencies or structural imbalances.Setup
- Configure a measurement input and set a custom display color in Global Audio Settings.
- Add the Spectrograph module to a tile.
Features
- Visual Heatmap: Frequency intensity is displayed as color density over time, with configurable scroll rate and a choice of frequency scale.
- Color maps: Fire/Plasma, Green Phosphor, Purple Glow, Amber, or a Custom map.
- Range: Set the dB range independently of other modules, and apply the same A/C/Z/C-A weighting options as the SPL Meter and RTA.
- Link to RTA: Optionally link the color and range settings to a companion RTA tile so both stay in sync.
- Color Syncing: The module automatically utilizes the custom color you defined for that input in your global settings, making it easy to identify which mic you are looking at.
- No-input state: Shows a clear “No audio input available” message instead of a blank tile when no input is selected.
DAW Transport
Keep your dashboard in sync with your playback rigs by monitoring and controlling supported DAW (Digital Audio Workstation) transport workflows.Setup
- Connect your DAW via MIDI or network protocol in the External Devices settings, and choose the matching transport type: Pro Tools HUI, Logic Pro HUI, Reaper HUI, Reaper MCU, Cubase/Nuendo HUI, Digital Performer HUI, Generic HUI, or Generic MTC/MMC.
- Add the DAW Transport module to a tile.
Features
- Transport Monitoring: See exactly when your DAW is playing, stopped, or recording.
- Dashboard Control: Send Rewind, Stop, Play, Record, or Fast Forward directly from your Relay tiles without switching applications.
- Command mode: Choose Automatic, MMC, or MCU to control how transport commands are actually sent, depending on what your DAW and connection type support.
- Display mode: Show a running clock or SMPTE-style timecode, depending on the transport type.
Live Transcription
Converts a selected audio input into scrolling text on the dashboard. This is incredibly useful for providing live cues or context to operators without an intercom.Setup
- Add inputs via the Transcription tab of your Global Audio Settings.
- Add the Live Transcription module to a tile and select the input.
Features
- Advanced Controls: Fine-tune auto-gain sensitivity and engine preference per-input.
- Word Substitutions: Easily filter or replace specific words on the fly (e.g., replacing a speaker’s verbal tick).
- Profanity Controls: Automatically mask or remove profanity from the transcript.
- Automation Triggers: You can use word detection to trigger automation workflows.
- Transcript tools: Show live transcript entries, copy or export the transcript as text, clear it, or jump to the most recent entry.
Global Audio Settings
Relay uses a centralized configuration manager for all audio sources, split into two tabs:- Measurement — inputs used for visual monitoring (SPL Meter, RTA, Spectrograph). Add inputs, set a calibration offset in dB, and choose a custom display color for visualization graphs.
- Transcription — inputs used specifically for speech-to-text, including the auto-gain, engine preference, word substitution, and profanity controls described above.