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Audessence ALPS-1

Audessence ALPS-1
Audessence ALPS-1

A tamper-proof solution designed to solve audio level problems – completely! Digital, cost-effective and flexible, ALPS-1 provides control of perceived audio loudness (volume), dynamic range and peak level (modulation).  This broadcast audio processor is suitable for all situations where some combination of these three must be powerfully yet unobtrusively controlled. A truly versatile audio leveller / leveler, ideal for radio studios, codec protection, STL protection, satellite feeds, transmitter protection, web streaming and remote broadcast site operations.

Part Number: ALPS-1 (USB & RS232 access only)
Part Number: ALPS-1 + IP

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Frequency Response:
DIGITAL-DIGITAL: 20Hz-20kHz +/-0.1dB
ANALOGUE-ANALOGUE: 30Hz-20kHz +/-0.5dB 

DIGITAL-DIGITAL (rms 20Hz-20kHz): <-117dBFS
ANALOGUE-ANALOGUE: (rms 20Hz-20kHz): <-83dB ref: Limit point +8dBu 

DIGITAL-DIGITAL (6dB limiting): <-100dB / 0.001% THD 
ANALOGUE-ANALOGUE (6dB limiting): <-80dB / 0.01% THD 

Stereo Separation (L/R crosstalk):
DIGITAL-DIGITAL (at 3kHz): <-117dB 
ANALOGUE-ANALOGUE (at 3kHz): <-82dB 

ANALOGUE: Balanced, 10k (bridging), ¼” Jack [TRS]. Standard operating level -6dBu to +14dBu (+22dBu clip point) 
DIGITAL: S-PDIF (RCA/Phono); 32, 44.1, 48, 88.2, 96kHz sample rate. 16, 20, or 24 bits. 

ANALOGUE: Active true balanced, standard operating level -6dBu to +18dBu
DIGITAL: AES-3 (XLR); full input rate / half rate.

Processing blocks: 
Gated AGC: Capture range +/-20dB; maximum positive gain can be set. Advanced AGC enables faster, programme-dependent operation. Defeatable.
Compressor: Nominal 2:1 slope and 4dB maximum boost of low levels. Defeatable.
Wide-band Limiter: Zero overshoot 1.3ms look-ahead zero clipping. Defeatable.
HF Limiter: Protects 50us or 75us emphasis curve for FM broadcast applications. Defeatable. 

Setup is via PC GUI only. Select a factory preset, modify it, set levels etc, save to Flash memory. USB on front panel, plus RS-232 on rear panel. ASCII Text based command format.
Every processing parameter, including all thresholds and time constants, can be accessed and modified under PC control (GUI included).

Power: 100 – 240V AC Nominal (acceptable range 88V to 264V AC) / 5 Watts. 
Dimensions & weight: 1-RU: 44 x 482 x 290mm deep / 1.75” x 19” x 11.25” deep. 
Weight: 1.8kg / 4lbs 

Warranty: 3 year return-to-base warranty
Approvals: CE (EMC and LVD), RoHS


Download the ALPS-1 datasheet.

Download - File size: 411KB

Information reproduced with the kind permission of Audessence.