Alesis Hammerfall DSP System 用户手册

 

 
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User's Guide HDSP MADI

 © RME

 

 

Stereo Monitor Output (Phones) 
•  Signal to Noise ratio (SNR): 110 dB RMS unweighted, 112 dBA @ 44.1 kHz (unmuted) 
•  THD: < - 100 dB, < 0.001 % 
•  THD+N: < -98 dB, < 0.0015 % 
•  Crosstalk: > 100 dB 
•  Frequency response @ 44.1 kHz, -0.5 dB: 1 Hz – 21.1 kHz 
•  Frequency response @ 96 kHz, -0.5 dB: 1 Hz – 43.5 kHz 
•  Output: 6.3 mm / 1/4" TRS jack 
•  Output impedance: 50 Ohm 
•  Output level @ 0 dBFS: +13 dBu 
 
 

 
•  Clocks: Internal, MADI In, Word Clock In, optional Video and LTC In 
•  Low jitter design: < 1 ns in PLL mode, all inputs 
•  Internal clock: 800 ps jitter, random spread spectrum 
•  Jitter suppression of external clocks: about 30 dB (2.4 kHz) 
•  Effective clock jitter influence on DA conversion: near zero 
•  Provides nearly jitter-free word clock directly from the MADI input signal 
•  Input PLL ensures zero dropout, even at more than 100 ns jitter 
•  Supported sample rates: 28 kHz up to 200 kHz 
 
 

 
•  2 x MIDI I/O via breakout cable 
•  1 x MIDI I/O via MADI 
•  PCI bus based hi-speed operation 
•  Seperate 128 byte FIFO for input and output 
•  MIDI state machine in hardware for reduced interrupt request load 
•  Invisible transmission via User bit of channel 56 (up to 48 kHz) 
•  Invisible transmission via User bit of channel 28 (up to 96 kHz) 
 
 

 
ASIO 
•  24 / 32 bit 4 bytes (stereo 8 bytes) 
 
This format is compatible with 16 bit and 20 bit. Resolutions below 24 bit are handled by the 
audio application. 
 
MME 
•  16 bit, 2 bytes   

(stereo 4 bytes) 

•  20 bit, 3 bytes MSB  (stereo 6 bytes) 
•  20 bit, 4 bytes MSB  (stereo 8 bytes) 
•  24 bit, 3 bytes    

(stereo 6 bytes) 

•  24 bit, 4 bytes MSB  (stereo 8 bytes) 
•  32 bit, 4 bytes    

(stereo 8 bytes) 

 
8-channel interleaved: 
•  16 bit, 2 bytes   

(stereo 4 bytes) 

•  32 bit, 4 bytes   

(stereo 8 bytes)