PRELUDE SOUND CARD
Zorro II based 16-bit Amiga sound card
Technical Information List:
- Zorro II compliant interface (full size)
- 2kB FIFO cache onboard / 2x16 Bit Fifo SoundChip Cache
- Crystal Semiconductor Sound Codec 4231A
- high quality analogue part with seperate ground plane
- Full Duplex ability
- Frequency range from 5510Hz to 48000Hz
- hardware supported codings: ALaw, uLaw, 16Bit, 8Bit, ADPCM
- Stereo: Line In, MIC In (with built in Microphone Amp), Aux1 In, Aux2 In
- MONO In / MONO Out with built in amplifier for optional internal speaker support
- internal Inputs for connection to Amiga Audio, CDRom Audio, Speaker Out
Software support
- AHI compatible / full driver support
- Shared library with full documentation
- Supported by Samplitude, AudioLab AL16Prelude, SoundFX (AHI), HippoPlayer (ModulePlayer with AHI), Play16 and many more (Camouflage to come)
- example sources (SAS C)
AudioLab 16 - Prelude version

Overview
AudioLab16 is a digital audio postproduction application for the AmigaOS. The following details a specific version for the Prelude board.
Direct-from-disk tecnology
Any operation is performed in direct-from-disk mode: audio-streams durations are limited by disk space availability, not RAM space availability.
- Maximum audio streams size: 2 gigabytes each
- DOS volumes are supported: no special partitioning is needed
- Multitrack mode allows spreading a single project over hard-drives, ram drives, magneto-optical drives, cdrom drives (AsimWare AsimCDFS3.5 required for DOS level access to AudioCDs) operating simultaneously in direct-from-disk mode
Realtime output through the Prelude
The results of processing, non-linear editing and mixing operations can be monitored in realtime, 16bit mode, through the Prelude analogue outputs.
- 32KHz/44.1KHz/48KHz
- Multiple channels
Non linear multitrack editing
Non linear editing capabilities allow rearranging the temporal sequence of audio events without changing the structure of the original streams. The process is also non-destructive (original material is not modified during cut and paste operations). Multiple tracks on simultaneous playback through the Prelude are possible.
- Sixteen non linear tracks editing
- Up to eight tracks on simultaneous playback
- Multitrack graphic timeline
- Double timecode notation (hh:mm:ss:ff and bars:beats:clocks) with autosnap-to-grid capabilities
- Drag and drop mouse control (time slipping, cloning, aligning,...) for events and tracks
- Clear/cut/copy/paste/insert/multi-insert on up to 16 tracks at the same time
- Multilayer mixing controls: indipendent event level and stereo pan controls, indipendent track level and stereo pan controls, master level controls, mute/solo switches
- Insertion/retrival of user defined text labels (comments) onto the timeline
- Timeline views snapshot bank
Digital signal processing
Digital signal processing operators allow signal restoration, optimisation and creative modifications.
- noise gate
- delay
- flange
- multiflange
- invert
- pitch-shift
- time compress/expand
- sample rate convert
- interpolate
- decimate
- distort
- FIR/IIR filter
- reverberate
- hum-remove
- quantise
- reverse
- normalise
Waveform display
Graphic waveform display allows visual inspection and easy interaction during ranges definition.
- Graphic waveform display for on-disk recordings
- User configurable graph resolution/speed to match different media seeking speeds (hard-drives, magneto-opticals, AudioCDs, ...)
- Bi-dimensional zooms
- Extensive range management and monitoring: monitor range, before range start, range start, range end, after range end ,...
Signal generation
Reference signals are usefull for testing and tuning equipement.
- Multiwaveform generator
- Impulse
- Noise
- Sine
- Square
- Triangle
- Sweep generator
AudioCD management
Audio effects libraries are available on AudioCDs. AudioLab16 can digitally transfer the AudioCD tracks to your hard drive, to include them in your multitrack projects.
- Transport controls (play/stop/eject/...)
- TOC management
- Digital audio transfers from AudioCDs to hard drives (compatible CDROM
unit required)
Playback triggering
AudioLab16 can be slaved to an external MIDI hardware device or to a concurrent Amiga software application in order to playback on-disk recordings with accurate sincronization.
- Direct-from-disk playback triggering via external MIDI devices (MIDI interface required), applications capable of sending AREXX commands or, manually, via the computer keyboard
- Zero-delay reaction to NOTE_ON commands: perfect sincronisation with external events
- Juke-box mode: audio streams can be selected (and played) via MIDI/AREXX/keyboard commands
FIR filter design
The "FIR Filter" DSP operator can reads ASCII text files defining different FIR structures. AudioLab16 can generate such text files depending on user preferred filter specs (cutoff frequency, taps,...).
- Sinc windowing generator:
- Rectangle
- Hanning
- Triangle
- Hamming
- Blackman
- Blackman-Harris
- Up to 127 taps
- Band shifter handles low-pass, hi-pass, band pass and notch filter generation
- Graphic displays
Audio file formats
AudioLab16 can exchange audio data files with PC, MAC, Unix, Amiga platforms.
- AIFF
- STUDIO16
- MAUD
- MAESTRO
- WAVE
- IFF/8SVX
- SUN/NeXT
- VOC
- RAW
Samplepoints formats
Raw streams can be processed and converted to common audio files formats.
- PCM 16 bit linear signed MSBLSB
- PCM 16 bit linear signed LSBMSB
- PCM 16 bit linear unsigned MSBLSB
- PCM 16 bit linear unsigned LSBMSB
- PCM 8 bit ulaw
- PCM 8 bit linear signed
- PCM 8 bit linear unsigned
- DPCM 4 bit log
Cross-platform compatibility
Using AudioLab16 it's possible to exchange 16bit formatted audio files with the following hard disk recording software:
Program Platform Format
- Audioshop (Opcode Systems) MAC AIFF
- Cubase Audio (Steinberg) MAC AIFF
- Deck II (OSC) MAC AIFF
- Digital Performer (Mark Of The Unicorn) MAC AIFF
- Digitrax (Alaska Software) MAC AIFF
- Logic Audio (Emagic) MAC AIFF
- Pro Tools (Digidesign) MAC AIFF
- Session 8 Mac (Digidesign) MAC AIFF
- SoftSplice (Digital Expressions) MAC AIFF
- Sonic System (Sonic Solutions) MAC AIFF
- Sound Designer II (Digidesign) MAC AIFF/WAV
- SoundEdit16 (Macromedia) MAC AIFF/WAV
- Studio Vision (Opcode Systems) MAC AIFF
- Cubase Audio PC (Steinberg) PC AIFF
- FastEddie (Digital Audio Labs) PC WAV
- MicroSound (Micro Technology) PC WAV
- SADiE Disk Editor (Studio Audio and Video)PC WAV
- SAW (I.Q.S.) PC WAV
- Session 8 PC (Digidesign) PC WAV
- SSHDR1 HDRecorder (Soundscape Digital T.) PC WAV
- Techno Lab (Digital Manager) PC WAV/raw16
- The EdDitor Plus (Digital Audio Labs) PC WAV
- Quad (Turtle Beach) PC WAV
- Wave for Windows (Turtle Beach) PC WAV
Product Pricing
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