Standard Audio Stretch – Multi-Band Compressor (500-Series Module)
OVERVIEW
The Standard Audio Stretch is an API 500 Series Multi-Band Compression Unit inspired by the classic tape noise reduction units from the 1970s and 1980s. While noise reduction units were often just used for reducing tape noise, engineers and producers would often misuse/abuse them and modify them to create sounds unobtainable by available compressors, limiters, and equalizers. After analyzing many classic and vintage noise reduction units, the modifications performed, and the methods of use, Standard Audio designed the Stretch from the ground up to enable the modern engineer/producer to easily recreate those classic techniques and take them further.
KEY HIGHLIGHTS
- Four Frequency Bands – individually processed.
- Filter/Compression Push-Button – lets the user cycle continuously through 7 different filter combinations… Orange HPF and LPF front panel LEDs indicate the different combinations.
- 100% Analog Signal Path.
- Highest Quality – high-reliability amplifier circuit design, and high-quality filter capacitors for filter stages.
- Engage Push-Button – enables/disables true hard-wired relay bypass circuit… The unit is engaged when the push-button LED is lit.
- Filter/Compression Push-Button LED – indicates when any of the active filter stages has reached 2dB of compression.
- Input Control – allows the user to set the gain structure through the unit so that the desired amount of compression is occurring.
- Output Control – a post-mix circuit output level control allows the engineer to set the output level to DAW/Tape without altering the mix blend.
- Mix Control – blend the Stretch signal in with the un-processed input signal to vary the amount of effect desired.
THEORY OF OPERATION
FILTER
The filter section splits the input signal into 4 frequency bands. Different filter combinations can be selected by pressing the filter push-button.
COMPRESS
Each frequency band has its own VCA compressor stage with tailored ratio and time constants. Active bands are compressed individually.
MIX
Mixing in the dry, uncompressed signal provides the classic gain response of noise reduction encoding. Signals below the threshold are dynamically boosted, bringing forward low-level detail.
FEATURES &Â TECHNICAL SPECS
- INPUT Pot:Â Controls input level into the filter/compressor circuit.
- OUTPUT Pot:Â Controls output level – post-mix control, so output level adjustments will not affect wet/dry blend.
- FILTER Push-Button & COMPRESSION Led:
- The FILTER button, when pressed, allows the user to cycle through 7 different combinations of the 4 filter bands.
- The COMPRESSION Led indicates when any active band has begun to compress. Useful for setting input pot to ensure input level is within active range.
- HF & LF FILTER Led (orange): The orange FILTER Leds indicate which frequency bands are active.
- ENGAGE Push-Button: The ENGAGE button controls a true relay bypass.
- MIX Pot: The MIX pot controls how much of the processed (wet) signal is blended with the original (dry).
- 500 Series Format: Compatible with the API 500-series format standard – tried and tested in hundreds of racks around the world.