ALESIS Hammerfall DSP System User Manual
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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
29.3 Digital
• 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
29.4 MIDI
• 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)
29.5 Transfer Modes: Resolution / Bits per Sample
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)