ADC8 Mk IV DAC8 Mk IV USER MANUAL V1.
A/D Converter ADC8 Mk IV The EMM Labs 8-channel A/D converter is a 4th generation design to meet the highest standards in professional audio recording applications. It offers conversion between analog and digital audio of various different formats, as well as conversion between digital audio formats. Features • 8-channel conversions: • from analog to PCM (16/24 bits selectable and 44.1kHz - 96kHz) • from analog to DSD • from DSD to PCM (44.
Signal flow PCM (AES/EBU) DSD DSD to PCM Conversion DSD (Optical) DSD (RAW/SDIF3) (shared Conn.) PCM (SDIF2) DSD (optical) A/D Conversion Analog DSD DC Removal DSD (shared Conn.) Note: Analog inputs are balanced with pin 2 hot, pin 3 cold and pin 1 GND. For unbalanced inputs just connect to pin 2 and tie pin 3 to GND. Function Switches Note: Some configurations require long settling times of up to several seconds after changing switch positions.
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Digital Audio Input Section OUT / IN: OUT position selects conversion from analog to digital. IN position selects conversion from digital to digital. OPTIC / BNC: If the DATA DIR switch is set to IN, this selects data input between optical or BNC connectors (data format is selected in Interface Format Section). Interface Format Section RAW / SDIF-3: When DSD is on BNC the user has the choice between RAW and SDIF-3 formats.
Table 1: Functional Modes of A/D Conversion BNC Analog In AES/EBU Optical In Optical Out Analog to DSD, PCM DSD Out In PCM Out - DSD Out Analog to DSD, PCM PCM Out (SDIF-2) In PCM Out - DSD Out DSD to DSD, PCM DSD In - PCM Out - DSD Out DSD to DSD, PCM DSD Out or PCM Out - PCM Out DSD In DSD Out Basic Operation In addition to the basic conversion modes shown below, the ADC8 Mk IV converts between DSD on optical and DSD on BNC (RAW DSD or SDIF-3) and back again.
• DSD format on BNC connectors RAW DSD / SDIF-3 Conversion from DSD to PCM SAMPLE RATE CLOCK INT EXT OPTIC LOCK BNC EXTERNAL 64 1 FS DIGITAL AUDIO IN 44.1 INTERFACE FORMAT OUT OPTIC RAW DSD BNC SDIF-3 128 2 FS 48 IN OVERS. PCM BASE DATA-DIR 16 BIT DSD 2 24 BIT OPTIC PCM OUT PCM BNC “Empty” switch positions are ignored. DSD input can be on BNC or optical connectors. Appropriate selections have to be made in the CLOCK and DIGITAL AUDIO IN sections (OPTIC / BNC).
D/A Converter DAC8 Mk IV The EMM Labs 8-channel D/A converter is a 4th generation design to meet the highest standards in professional audio recording applications. It offers conversion between digital audio of various different formats and analog, as well as conversion between digital audio formats. Features • 8-channel conversions: • from PCM (44.1kHz - 96kHz) to analog • from DSD to analog • from PCM (44.1kHz, 88.
Signal Flow Optical DSD (RAW / SDIF3) (shared Conn.) DSD DSD (Optical) PCM to DSD Conversion PCM (AES/EBU) PCM* (SDIF2) (shared Conn.) PCM RAW DSD / SDIF3 (shared Conn.) D/A (shared Conn.) DSD DSD Analog PCM Note: *SDIF2 inputs expect 24-bits (or 0-filled 16 bits) of PCM Note: Analog outputs are balanced with pin 2 hot, pin 3 cold and pin 1 GND.
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OPTIC / WIRE: Selects the physical connector for input data (optical or WIRE). For the WIRE selection an additional switch is necessary to define WIRE as either BNCor XLR.
Basic Operation In addition to the basic conversion modes shown below, the DAC8 Mk IV converts between DSD on optical and DSD on BNC (RAW DSD or SDIF-3) and back again. Conversion from PCM on AES/EBU to Analog CLOCK SAMPLE RATE INT POWER ERROR LOCK DIGITAL AUDIO INPUT IN DSD OPTIC OUT PCM WIRE BNC-DIR 1 FS EXT 44.1 2 FS 48 PCM BASE IF FORMAT 64 BNC RAW DSD XLR SDIF-3 PCM 128 WIRE BNC BNC OUT OVERS DSD Additional selections for 44.1 / 48 / 88.
Conversion from PCM on BNC (SDIF-2) to Analog CLOCK SAMPLE RATE INT POWER ERROR LOCK 1 FS EXT DIGITAL AUDIO INPUT IN DSD OPTIC OUT PCM WIRE BNC-DIR 44.1 2 FS 48 PCM BASE IF FORMAT 64 BNC RAW DSD XLR SDIF-3 PCM 128 WIRE BNC BNC OUT OVERS DSD Additional selections for 44.1 / 48 / 88.2 / 96kHz sample rate and for the 64/ 128 oversampling ratio can be made with the sample rate and oversampling switches. “Empty” switch positions are ignored.
Additional selection for RAW DSD or SDIF-3 format for DSD input can be made with the interface format switch. The overampling switch needs to be set to the sample rate (64FS or 128FS) of the DSD input data. “Empty” switch positions are ignored. Conversion from DSD on Optical to Analog CLOCK SAMPLE RATE INT POWER ERROR LOCK DIGITAL AUDIO INPUT IN DSD OPTIC OUT PCM WIRE BNC-DIR 1 FS EXT 44.
Conversion from PCM on AES/EBU to DSD on BNC (RAW DSD or SDIF-2) and Optical CLOCK SAMPLE RATE INT POWER ERROR LOCK DIGITAL AUDIO INPUT IN DSD OPTIC OUT PCM WIRE BNC-DIR 1 FS EXT 44.1 2 FS 48 PCM BASE IF FORMAT 64 BNC RAW DSD XLR SDIF-3 PCM 128 WIRE BNC BNC OUT OVERS DSD Only 44.1kHz based PCM can be converted to DSD. Additional selections can be made for 1FS / 2FS for PCM input and for RAW DSD / SDIF-3 for DSD output.
