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Antex electronic SX-33E, SX-33B user manual Digital-to-AnalogConversion

Models: SX-33B SX-3 SX-33 SX-33E

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Figure 2. Digital-to-Analog Conversion

Figure 2. Digital-to-Analog Conversion

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Antex electronic SX-33E, SX-33B user manual Digital-to-AnalogConversion

Contents

16-BITPRO SOUND January 18, ANTEX ELECTRONICS CORPORATIONSX-3 SX-33 SX-33b SX-33e 16100 SOUTH FIGUEROA STREET GARDENA, CALIFORNIATABLE OF CONTENTS FIGURES INTRODUCTION ABOUT DIGITAL AUDIOIn essence, digital audio is a technological process whereby an analog audio signal produced when sound waves in the air excite a microphone is first converted into a continuous stream of num- bers or digits. Once in digital form, the signal is extremely im- mune to degradation caused by system noise or defects in the storage or transmission medium unlike previous analog sys- tems. The digitized audio signal is easily recorded onto a variety of optical or magnetic media, where it can be stored indefinitely without loss. The digitized signal is then reconverted to an analog signal by reversing the digitizing process. In digital audio rec- ord/playback systems, each of these two functions is performed separately. In digital audio signal processing systems where no record/playback function occurs both analog-to-digitaland digital- to-analogconversion processes occur simultaneously. A variety of techniques are possible, but the most common method by which audio signals are processed digitally is known as linear pulse code modulation, or PCM. Lets take a brief look at how PCM works Figure 1. Analog-to-DigitalConversion Page Figure 2. Digital-to-AnalogConversion MINIMUM HARDWARE RECOMMENDED ADAPTER INSTALLATIONJUMPER SETTINGS Figure 3. Setting JP7 for audio IRQx CONNECTIONS Z1/Z1e SX-3/SX-33/SX-33eMIDI/Joystick Breakout Connector Z1/Z1e Only Audio Input LineMicrophone Audio OutputDRIVER INSTALLATION DISKS Z1/Z1e only WINDOWS DRIVER INSTALLATION WINDOWS DRIVER CONFIGURATIONTest new settings by selecting Test 3.To set adapter typeDOS DRIVER INSTALLATION CD-ROMDRIVER INSTALLATION Z1/Z1e ONLYUSING DOS DEMONSTRATION SOFTWARE Figure 6. DOS Demo Environment Q-QuitC-Channels T-FormatISO/MPEG-1BITRATES & FORMAT F-FileI-FileFormat A-SampleRateRec Vol dB Left Right Play Vol dB Left RightS-Stop S-StartD-Append P - PlayBottom Right of Screen PROBLEMS RUNNING THE DEMOCenter of Screen - Mixer Sample Rate USING WINDOWS DEMONSTRATION SOFTWAREFigure 7. The Antex Demo Window Compression ChannelsVU Meters Wave DeviceRecord/Stop Figure 9. File Open dialog box FilePlay/Stop Volume Customer support is available from Antex @ANTEX MIXER Figure 10. Antex Mixer MIXER BUSES RECORD MODEPLAY MODE Feedthrough MIXER DEVICESSYNTH OPL3 FM Synthesizer Z.WAV Wavetable synthesizerNote Optional hardware is required WAVE Digital audio playbackUTILIZING DIGITAL AUDIO COMPRESSION UNDER WINDOWS Audio Adapter Compression Capabilities CONNECTOR DESCRIPTION Figure 11. Z1/Z1e Connector LayoutANTEX SERIES MODEL Z1 AND Z1E Z1/Z1e1.Joystick/MIDI Connector - J10 2. Output Header - J33. AUX/CD-ROMHeader - J4 4. Microphone Header - J55.SCSI CD-ROMHeader - J1 6.Synthesizer Daughtercard MIDI Header - J27.Z.WAV Sound Module MPU-401Header - J11 8.Z.WAV Sound Module DSP Header - J129. C52 DSP Emulation Header - J13 10. C31 DSP Emulation Header - J14Figure 12. SX-3/33/33b/33eConnector Layout ANTEX SERIES MODEL SX-3/33/33B/33ESX-3/SX-33/SX-33b/SX-33e CONNECTOR DESCRIPTION1. Output Header - J3 2. AUX Header - J4SETTING JUMPERS ON EARLY MODEL Z1/SX-3 3. Microphone Header - J54.Z.WAV Sound Module MPU-401Header - J11 5.Z.WAV Sound Module DSP Header - J12Current Jumper Old JumperNumber Figure 13. Jumper Number Conversion TableISO/MPEG-1BITRATES & FORMAT EXTENSIONS Layer NEW Z1/Z1E/SX-3/SX-33/SX-33ESAMPLE RATES WINDOWS NT & Z1E SCSI IRQ JUMPERTECHNICAL/ORDERING INFORMATION TOLL FREE 800 PHONE 310 FAX 310 BBSANTEX ELECTRONICS CORPORATION 16100 S. FIGUEROA STREET GARDENA, CA