Universal Audio
Studer A800 Tape Recorder
Emulates a multitrack tape recorder's saturation, compression, and tonal response, with selectable tape formulations, speeds, record/playback paths, and calibration.
GUI Screenshot
From My Notebook
The page is ready. Listening notes, favorite settings, and experiments will live here.
The Overview
Multitrack Tape Behavior
Studer A800 models the electronics and magnetic-tape stages of a multitrack recorder. Input drive determines how strongly the tape saturates, while tape stock, speed, and calibration change its headroom and frequency response. Separate monitoring paths let you hear electronics alone or different recording/playback head combinations.
The main panel handles routine operation; the secondary panel exposes bias, record and playback EQ, emphasis, and noise. Auto Cal establishes an aligned starting point so those adjustments are optional rather than a prerequisite for use.
A Tape-Based Workflow
For conventional multitrack processing, use it early in each track's insert chain, before EQ and compression. Other placements remain useful for creative coloration or subgroup processing. Set the tape configuration, bring Input to the desired saturation, and compensate with Output.
The DSP version's Gang Controls can apply changes across instances, approximating a shared multitrack machine. That feature is absent from the native UADx version and can overwrite individual channel differences, so use it deliberately.
Source: Manual - Operational Overview; Primary Controls; Secondary Controls; Gang Controls; Calibration Controls.
The Controls
Main Panel
- Input: Drives the tape circuit from -12 to +24 dB. Higher input increases saturation and output level.
- Output: Applies final compensation from -24 to +12 dB.
- VU Meter: Shows the signal after virtual tape; use it to judge operating level alongside listening.
- Tape Type: Selects 250, 456, 900, or GP9 formulation, each with different saturation characteristics.
- Cal Level: Selects +3, +6, +7.5, or +9 dB calibration. This changes the tape operating reference and headroom.
- IPS: Selects 7.5, 15, or 30 inches per second, changing bass response, fidelity, and distortion. Off bypasses processing.
Signal Path
Input monitoring uses electronics without tape. Sync records and plays through the sync/record head. Repro uses the separate reproduction head. Thru bypasses the model.
Secondary Panel
Open the panel using the Studer label or Open.
- Equaliser: Chooses NAB or CCIR emphasis at 7.5/15 IPS. At 30 IPS the audio curve is AES; the switch can still select the hum frequency.
- Auto Cal: Resets bias and calibration EQ to appropriate values when tape type, speed, or emphasis changes. Disable it before relying on custom alignment settings.
- HF Record EQ: Shapes high frequencies before the tape nonlinearity, affecting saturation as well as tone.
- HF Driver Bias: Adjusts recording bias. Overbias can soften the result; underbias creates stronger nonlinear effects and can cause dropouts at extremes.
- Sync HF/LF EQ: Shape playback only when Sync is selected.
- Repro HF/LF EQ: Shape playback only when Repro is selected.
- Noise Enable: Switches the modeled noise components on or off.
- Hum / Hiss: Set their amounts independently.
DSP Gang Controls
Gang Controls links parameter changes across DSP instances. A changed parameter replaces its value on the other instances rather than preserving offsets. Preset loads can propagate too. The setting is not saved with the session, and it is unavailable in UADx.
Use Thru or IPS Off for bypass; stopping reel animation alone does not bypass audio.
Source: Manual - Operational Overview; Primary Controls; Secondary Controls; Gang Controls; Calibration Controls.