MYTEK DIGITAL.USA MASTERING ANALOG TO DIGITAL CONVERTER USER MANUAL VER.
Quick Start……………………………………………….3 Introduction..…………………………………….............4 This manual may be updated Operation- Internal jumper settings........................……...5 Download the newest version at: Operation- Typical setup -Balanced Signal Source……...7 http://www.mytekdigital.com/manuals/stereo96adc_manual.pdf Operation- Analog input alignment……………...………9 Operation- Unbalanced Signal Source…….......................
Input volume knob sets the input sensitivity with range from mute to +4dB=-10dBFS. This is factory default. The knob can be disabled with internal jumpers which can select either the knob or internal precision 10 turn trimpots. Refer to "Internal jumper settings" for details. Sample rate selection. Sets the desired sample rate. When used with external clock select FS closest matching that of supplied external wordclock. Selects output wordlength as stated.
Stereo96ADC internal trimpots and jumper assignments (remove top cover to access) Stereo96ADC internal trimpots and jumper assignments (remove top cover to access) Jumper JP5: Wordclock input 75 Ohm termination. Connect this jumper when Stereo96 ADC is the last destination in a chain fed by external wordclock source and the cable is long (above 6ft). For short cables and wordclock sources with unknown drive capability JP5 should be left unconnected (unterminated) (retain the jumper on one pin only).
Typical Setup Balanced signal source Stereo96 ADC is equipped with 2 XLR analog inputs. For best signal to noise performance it is recommended the signal source has a typical low impedance output with standard +4dB line level balanced signal. Alternatively a weaker unbalanced signal source can be used as described in subsequent paragraph. In typical setup the ADC is running on its internal clock with the rest of equipment synchronized to Mytek clock either through digital output signal or wordclock.
Unbalanced Signal Source Operation Analog Input Alignment When using internal trimpots analog input level needs to be aligned using an approx 1kHz sinewave fed from +4dB balanced source. The alignment does not affect audio quality, only input sensitivity. The alignment is performed using 10 turn trimpots inside the unit (see: "Internal Jumpers"). A small tweaker or screwdriver is necessary. You have to arbitrarily decide what will be your studio "0 VU" analog/digital reference level.
The Supershaper HR (tm) used for 16 bit wordlength reduction is a sophisticated 9th order noise shaper with dither, similar in operation to Pow-r #3 (tm) noise reduction algorithm (see: "Supershaper HR..."). 6. Synchronize the destination either to digital input sync or to wordclock sync, depending on system configuration. The quality of recorded signal does not depend on how the digital destination is synchronized with Mytek AD converter. 7. Record- adjust input level by adjusting level at the source.
and must not be used for critical projects downsampling. Some such as Faulkner Downsampler (http://www.audiosignal.co.uk/freeware.html) provide excellent results for 88.2>44.1 but don't work for 96k. 88.2k is also easier to upsample to DSD. 96k sample rate, has in our opinion, a marginally better perceived sound quality than 88.2k but the difference is very small and difficult to perceive for most people. If the record is going to be mixed in analog domain, 96k might be a desirable choice for tracking.
More information about use of noise shaping in high resolution recording can be found in the following Audio Engineering Society Preprints ( http://www.aes.org ): “Optimal Noise Shaping and Dither of Digital Signals” “Coding Methods for High Resolution Recording Systems” Preprint Number: 2822 Convention: 87 1989-10 Author: Michael Gerzon Author: Peter G. Craven Preprint Number: 4639 Convention: 103 1997-09 Author: J.
Companion Stereo96 DAC Rack Mount Shelf The Stereo96 ADC is 1/3 rack space wide and 1U tall. Mytek provides a 1U rack mount shelf as accessory to mount up to 3 of 1/3 rack units. The units are attached to shelf with small screw connecting the shelf to bottom through a threaded hole on the bottom of the unit.
Warranty Specifications This Stereo96ADC digital audio converter is warranted by Mytek to the original purchaser against defects in workmanship and materials used in manufacture for a period of one year from the date of purchase. Faults due to customer misuse, unauthorized modifications or accidents are not covered by this warranty. Conversion: Linear, 128x oversampling at 44.1/48kHz 64x oversampling at 88.2/96kHz Resolution: 24 bit Sample rates: 44.1kHz, 48kHz, 88.
