M-Audio Dman 2044 [34/36] Appendix a glossary of terms
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Possible Cause 3: In an effort to eek out the best possible graphics
benchmark test results, many accelerated graphics cards hog the PCI bus
in order to improve their performance. As a result, other hardware in the
computer may be starved of bus and/or processor time. When starva-
tion becomes bad enough, audio recording and/or playback can not
keep up with the data requirements and this results in audible clicks,
pops and other audio artifacts. This is not the fault of the audio card.
Usually this problem is fixed by turning off or reducing the amount of
graphics acceleration used by the graphics card. In Windows 95, many
video cards will allow you to make this adjustment via Settings | Control
Panel | System | Performance | Graphics. In other products you may be
required to edit the SYSTEM.INI or other file. Please contact your graph-
ics card manufacturer regarding this adjustment.
Appendix A - Glossary of Terms
For those of you who do not speak "digital audio tech" (yet), we will
define some often-used terms here:
A/D Converter: A/D stands for Analog-to-Digital. An A/D converter
takes an analog audio input and converts it into numerical (digital) form.
The resulting numerical form is easily manipulated and stored by a host
computer.
D/A Converter: D/A stands for Digital-to-Analog. A D/A converter
takes numeric (digital) data as its input, then converts it and outputs it as
analog audio.
DSP: Digital Signal Processor. A processor optimized and tweaked for
use with complex signals such as audio.
Full-Duplex: The ability to record and playback at the same time. If you
are using a multi-track digital recording program, this is a very impor-
tant feature. Full-duplex would, for example, allow you to hear previ-
ously recorded vocal tracks while you are recording the harmonies.
PCI Architecture: PCI (Peripheral Connect Interface) is a high-speed bus
that supports Plug-and-Play. PCI is newer and faster than the ISA bus
which is in the original PC compatible computers.
Sample Rate: The rate at which analog audio is converted to numeric
data, or vice-versa. The higher the sample rate, the more accurate the
audio reproduction. As of the writing of this manual, audio CD’s are
recorded at 44.1 kHz sampling rate.
34
Содержание
- Contents 1
- Dman 204 1
- Manual 1
- Fcc class b ce compliance 3
- Introduction 4
- Midiman 4
- What s in the box 4
- Your dman 2044 box contains 4
- About the dman 2044 5
- Dman 2044 features 5
- Quick start guide 5
- Card installation 6
- Hardware installation 6
- System requirements 6
- Audio break out cable installation 7
- Making external connections to the dman 2044 7
- Configuring dman 2044 input gain 9
- Dman 2044 typical system setup 9
- Each dman 2044 audio input channel may be configured to accept either 10 db or 4 db signal levels this configuration is accomplished by installing or removing a hardware jumper for each channel an installed jumper factory default selects 10 db a removed jumper selects 4 db for best signal to noise performance use the 4 db setting and set your audio source louder than you would if using the 10 db set ting 9
- Input signal level jumper positions 9
- Jp1 jp2 jp3 jp4 9
- Midiman dman2044 9
- Software installation 10
- Windows 95 driver utility installation 10
- Verifying the software installation 11
- Windows 98 driver utility installation 11
- Dman 2044 operation 14
- Multi port device operation 14
- Hardware mixer operation 15
- Windows playback mixer 16
- Dman 2044 audio settings property page 17
- Windows multimedia properties 18
- Windows sound recorder 18
- Using advanced 3rd party applications 19
- Mac installation 20
- System requirements 20
- About digital recording 25
- Digital recording do s and don ts 26
- Choosing an audio format 27
- Troubleshooting resource conflicts 27
- Before pnp properly configuring a pc compatible system was no small task usually when new devices were added to the system the hardware was manually configured with jumper blocks and dip switches and there were configuration conflicts that caused the computer to work erratically or not at all users typically resolved configuration conflicts by consulting complicated documentation provided with the each inter face card contacting the supplier s technical support group consulting a friend or giving up in disgust even trained engineers found the pc card configuration process unreliable and frustrating as the current generation isa expansion cards were introduced including multi func tion versions with wavetable music synthesis hi fidelity audio mpeg audio video fax modem capabilities more systems resources were required than ever before causing even more system resource conflicts 28
- In 1993 the first pc pnp specification was proposed as a solution to com mon resource conflicts pnp defines a means for the computer to com municate with its various installed devices and resolve any potential resource conflicts in theory with a working pnp system jumpers and dip switches are a thing of the past and compliant hardware is config ured automatically or with little user intervention pnp works with exist ing bus architectures and is widely supported by the industry to gain 28 28
- Interrupt ibm pc assigns this interrupt to 28
- Plug and play pnp and resources 28
- Typical irq assignments in the pc 28
- Pci interrupts 29
- Recognizing an interrupt conflict 29
- Curing a resource conflict with a legacy card 30
- Hardware troubleshooting 31
- Troubleshooting 31
- Software troubleshooting 33
- Appendix a glossary of terms 34
- A d and d a converters 35
- Analog audio 35
- Appendix b technical specs 35
- Interface resource requirements 35
- Limited lifetime warranty 36
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