1/5/2024 0 Comments Drawmer dclock![]() I love saxophones as test subjects: They’re rich in harmonic overtones, which can be diminished or augmented through mic placement, and they bring out the best or worst of digital recording systems. I used the units on a tracking session recording a series of saxophones: baritone, alto, tenor and soprano. One downside on the front plate: The black lettering against the silver faceplate along with the extremely bright LEDs made both units difficult to read in low light situations. A great-looking, accurate 24-bar LED bar meter rounds out the brushed-aluminum front faceplate. The dual-output, selectable sample rate feature is a well-implemented idea. Word length is selectable at 16- or 24-bit for each output. Backups can be recorded with identical sample rates, if desired. For example, a 192kHz recording to your DAW could be taking place while sending a 48kHz signal to your video camera. Sample rates are selectable on the front panel between 44.1 and 192 kHz for each output. This is a great feature for doing remote recording or outside broadcast - multiple recorders with different formats can all be tracked simultaneously. Two digital output sections are also located on the back of the unit: an AES/EBU XLR, S/PDIF coaxial on RCA, and a TOSlink optical connection on both digital outputs all outputs are active at all times. Factory calibration places 0 dBFs at -18 dBU. ![]() Both input modes accept incoming signals from -2 dBU to +28 dBU. In Variable mode, two additional potentiometers with external knobs are provided for left/right variable-input control - these being much more accessible when the operating engineer needs quick access to the input levels. In Calibrated mode, two recessed, 24-turn pots allow precision adjustments for input levels in fixed installations where immediate adjustment is not necessary. Two input level modes are available: Calibrated and Variable. Two balanced XLR analog inputs are located on the back of the A2D2, both using Burr-Brown analog input circuitry. Three word clock outputs on BNC connectors are provided for word clock distribution, as well as an external word clock input to reference to a house distribution system, such as the M-Clock Plus. Clocking is paramount to proper operation of any A/D or D/A unit, and Drawmer uses the same clocking mechanism featured in its M-Clock Plus in the A2D2. The A2D2 is AES Grade-1, meaning that the internal clock has a drift of no more than ☑ PPM, providing a stable frequency source with minimum induced jitter. The Drawmer A2D2 DMS-3 uses the same clocking mechanism featured in the M-Clock Plus.ĭrawmer has released an upgrade to its digital line with the DMS-5 M-Clock Plus and a new companion piece, the A2D2 DMS-3 A/D converter.
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