The audio output should be balanced +4 dBm on XLR, TRS jacks or on DB-25 connectors. The Prism Sound DA-2 has a seven-way input source switch. Source selection is a bonus utilitarian feature, and the Troisi Design DC224DAC has selectable inputs. Like its A/D counterpart, a good D/A would have an internal, low-jitter clock and (if need be) the ability to clock from an external clock (BNC jack), or the embedded clock within the audio stream, or a dedicated AES-reference input XLR jack. A fully equipped D/A converter's back panel would bristle with enough connectors for all of the channels of analog outputs and then more for single, dual and quad-wire AES/EBU inputs for PCM, DSD-4, P3D and DXD, and then S/PDIF RCA jacks, ADAT Lightpipe or Toslink optical spigots, SDIF jacks and MADI BNCs. The modern high-end D/A would be able to convert to analog from a variety of incoming digital streams. For example, the Prism Sound AD-2 and Benchmark's ADC1 converters can output two or more streams at different bit depth/sample rates to make simultaneous copies for 44.1kHz/16-bit CD reference discs or 48kHz/16-bit digital video audio uses. In addition to "future-proofing" your master recordings by using high-sample-rate DSD or dCS Ltd.'s new DXD (Digital Xtreme Definition) format, you may be required to provide simultaneous digital audio for other external uses. Burl Audio offers the B2 Bomber A/D with its BX1 transformer in a discrete, Class-A, zero-feedback and DC-coupled (no caps) signal path that is said to complement your mic preamp's sound.ĭcs 905 DSD/DXD Analog-to-Digital ConverterĪ/D converters that output digital streams to accommodate several formats are another plus. If the A/D converter design objective would include a characteristic "sound", most of it would come from the analog front end (A/D) or the analog back end (D/A).
For example, Benchmark Media's ADC1 A/D has a 41-detent variable gain control, a 10-turn calibration trimmer and a three-position (-10/-20/-30dB) first-stage, gain-adjustment switch to preset the converter's analog operating environment. Other factors, such as the specific topology of the analog circuitry that precedes or follows it, or the quality of the clocking facilities, etc., will have a major effect on a converter's sound.Ī good A/D converter begins with a great analog front end, one that's capable of wide dynamic range without clipping by using precise, resettable level controls and attenuators. It's important to note that any converter design that relies solely on the best-rated chips does not necessarily guarantee its high performance. Chip manufacturers offer many versions depending on price, conversion method, number of channels, ancillary chip(s) required, additional DSP chip-interfacing features, THD/noise floor and dynamic range performance. The actual conversion of analog audio to digital data and digital to analog takes place within chips or chipsets.
If you consider that everything you record and everything you hear is running through these circuits, a consummate audio professional would have nothing less than the very finest. The best converters spare no expense in their designs, with quality components, power supply technology, clocking facilities and flexible control.
High-quality conversion is necessary whenever a master recording is being created or repurposed for commercial use. As if carved in stone, no matter how fine a D/A is used, you cannot recover audio quality that exceeds the original A/D's capability. The A/D converter is even more important because its audio quality-as constrained by sample rate, bit depth, conversion precision, clock stability, analog input section-is permanently embedded within the produced digital data. In the studio, a truthful D/A is just as important as proper monitor speakers and a good listening space. Mix Magazine "Compression And Compressors"īenchmark Media ADC1 Analog-to-Digital ConverterĪnalog-to-digital and digital-to-analog converters are "gateway" processors-the superaccurate portals that pros rely on in digital audio production.
Analog-to-Digital and Digital-to-Analog Converter Overviewīarry's Free Downloadable Equipment Front Panel Recall/Manualsīarry's Mix Magazine Equipment And Software Reviewsīarry's Massive Discography And Engineering Careerīarry's Music Connection Magazine Reviews