RME Audio DIGI32 Manuel utilisateur

User's Guide

PCI-Bus Digital In/Out Card

16 / 20 / 24 Bit Digital Audio

20 Bit Analog Monitor

Distributed by

24 Bit / 96 kHz üü

User's Guide DIGI32 PRO © RME 2

Contents

1 Introduction................................................................. 2

2 Supplied Contents....................................................... 3

3 System Requirements ................................................ 3

4 Brief Description and Characteristics.......................... 3

5 Technical Specifications

5.1 Overview................................................................... 4

5.2 Transfer Modes: Resolution/Bit per Sample............. 4

6 Hardware Installation.................................................. 4

7 Software Installation

7.1 Windows 95™............................................................ 5

7.2 Windows NT™........................................................... 5

7.3 Power PC (MacOS™)................................................ 5

8 Operation and Usage

8.1 Connections.............................................................. 6

8.2 Playback.................................................................... 6

8.3 Record....................................................................... 7

8.4 Record while Play...................................................... 8

9 Configurating the DIGI32 PRO

9.1 General ..................................................................... 9

9.2 Windows 95™.......................................................... 10

9.3 Windows NT™......................................................... 10

9.4 MacOS™.................................................................. 10

10 Using more than one DIGI32 PRO

10.1 General ................................................................. 10

10.2 Synchronisation..................................................... 11

10.3 Varispeed.............................................................. 11

11 Special Features of the Digital Output...................... 12

12 Troubleshooting........................................................ 12

13 Installation Problems with older PC.......................... 13

14 Soft- and Hardware Compatibility............................. 14

15 TECH INFO .............................................................. 14

16 Warranty................................................................... 15

1. Introduction

DIGI32 PRO allows the recording of digital audio from CD, DAT, sampler or other digital

sources directly into your computer. The installation is made very simple, even for the inexperi-

enced user, thanks to the most up to date Plug & Play technology. The support of up to 24 bit

audio resolution and up to 96 kHz sample rate puts DIGI32 PRO at the top of the range of

interface cards available to date. Drivers for Windows 95™, Windows NT™and MacOS™allow a

problem-free, comfortable and powerful usage on computer systems with PCI bus technology.

Our Hi-Performance philosophy guarantees full system performance in all possible functions not

carried out by the driver (and therefore from the computer´s CPU) but carried out by the

DIGI32 PRO hardware.

User's Guide DIGI32 PRO © RME 3

2. Supplied Contents

Please ensure that all the following parts are included in DIGI32 PRO’s packaging box:

• PCI Card DIGI32 PRO

• Short Info

• RME Driver CD

• Adapter cable (XLR/cinch)

• Internal cable (2 wire)

3. System requirements

• Windows 95™/ NT™or MacOS™

• A free PCI bus slot

• An unused IRQ

Additional system requirements such as CPU, memory etc. depend on the software used for

recording, playing and editing the audio data.

4. Brief Description and Characteristics

• Short, full Plug & Play compatible PCI card

• 16 / 20 / 24 bit audio resolution

• System integration with Windows’ Device Manager

• Display of the input sample frequency

• 4 inputs switchable during operation

• Outputs optical/cinch/XLR work simultaneous (signal distribution possible)

• Accepts Professional and Consumer Format, ignores copy protection

• Low impedance analog output with high quality 20 bit / 96 kHz DAC

• Error LED for input signal

• Low Jitter Design: < 1 ns in PLL mode (44,1 kHz, optical In)

• Sample aligned simultaneous start of record and playback in Record while Play mode

• High sensitive input stage (< 0,15 Vss input level)

• Ground free transformer coupled inputs and outputs

• No DMA or input / output address needed

• Full Duplex (simultaneous recording and playback)

• Driver for Windows 95™, Windows NT™and MacOS™

• Works with every usual recording or editing software

• Various pass through modes for input signal to analog and digital out

• High bus transfer rate (> 120 MByte/s) ensures minimal CPU / system load

• More than one card with only one driver useable (Windows)

• Automatic hardware self-test when booting

User's Guide DIGI32 PRO © RME 4

5. Technical Specifications

5.1 Overview

• Supported sample frequencies: 32/44,1/48/64/88,2/96 kHz, 25 kHz-105 kHz with AutoSync

• Input / Output: optical (TOSLINK), coaxial (Cinch), XLR (AES/EBU), internal (jumper)

• Format: Consumer (SPDIF) and Professional (AES/EBU)

• Dynamic analog output: >94 dB

• Bus: PCI 32 bit

• Audio resolution: up to 24 bit digital, 20 bit analog

• Display: Error LED for input signal

5.2 Transfer Modes: Resolution / Bits per Sample

• 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) (*)

* The indicated modes are directly supported by the hardware and therefore work in 32 bit hi-

speed transfer mode. The other modes (so called 'packed byte' formats) are queued up to 32 bit

data packets by special copy routines in the driver. These routines are written in Assembler,

causing no measureable system load. The supported modes with other Operating Systems than

Windows 95/98™and NT™depend on the OS and/or the corresponding drivers.

6. Hardware Installation

Important: Switch off the computer and remove the power cable from the power supply before

fitting the DIGI32 PRO. Inserting and removing the card when the computer is in operation

will more than likely lead to irreparable damage to the mainboard!

1. Disconnect the power cable and all other cables from the computer

2. Remove the PC housing; further information on how to do this can be obtained from your

computer´s instruction manual

3. Neutralize the static build up by touching the PC metal-chassis before unpacking the

DIGI32 PRO from the protective bag.

4. Insert DIGI32 PRO into a free PCI slot, press and fasten the screws.

5. Re-place the PC housing and tighten the screws.

6. Re-connect the power cable and all other cables/connections.

User's Guide DIGI32 PRO © RME 5

7. Software Installation

7.1 Windows 95™

After fitting the card (see 6. Hardware Installation) and switching on the computer, Windows 95™

discovers a new hardware component and starts the assistent for device installation. Insert the

RME Driver CD into your CDROM drive, and follow the instructions prompted on the screen.

Windows 95™will now install the DIGI32 PRO driver and reports that it is an audio device.

After that it is ready to use.

Due to a bug in Windows 95 OSR2 the path to the CDROM drive has to be typed in again

during the copy process.

7.2 Windows NT™

Because Windows NT™4.0 has not yet been supplied with a hardware recognition (Device Ma-

nager), the drivers must be installed by hand. This is very easy to do, as thanks to Plug & Play

IRQ (interrupt) and memory area are already defined.

After fitting the card (see 6. Hardware Installation), switching on the computer and completed

boot of Windows NT™insert the RME driver CD into your CDROM drive and add new devices by

using >Settings/Control Panel/Multimedia/Devices/Audio Devices/Add<. Change to the CD's

directory \nt\nt32. Windows NT™will now install the drivers and registers them as audio devices.

Finally DIGI32 PRO's Settings dialog shows up.

To finish the installation you MUST now press the 'Apply' button once! As long as 'Apply' is not

pressed at least one time the driver installation is incomplete, there is no display of the sample

rate and of the slot number. When installing more than one card 'Apply' has to be pressed for

each card once.

After clicking 'Apply' the driver is added to the registry, and the card is ready to be used.

7.3 Power PC (MacOS™)

Working with various software on the Mac requires registering the card in the Sound Manager.

But the Sound Manager does not support more than 16 bit and 48 kHz. A complete support of all

the outstanding features of the DIGI32 PRO is currently only available when using our

ASIO driver with related software. This allows up to 24 bit and up to 96 kHz at a very low latency.

The driver file is located in the RME Driver-CD's directory \Mac and includes an installation pro-

gram. After fitting the card (see 6. Hardware Installation), switching on the computer and boot of

MacOS™first decompress the file (Stuffit format). Then start the installer and follow the instructi-

ons on the screen. At last the file 'Digi32 ASIO' which is located in the new 'RME' folder must be

copied into the 'ASIO Drivers' folder of the corresponding ASIO software.

It is not possible to use the DIGI32 PRO with the control panel 'Monitors and Sound'! This

is a restriction of the operating system. That's why Apple still ships the old control panel 'So-

und', available in the Apple Extras Folder. Drag it to the system folder before installing our card

and drivers to gain complete access to the DIGI32 PRO as expected.

More informations can be found on our Mac web page (or on the Driver-CD).

User's Guide DIGI32 PRO © RME 6

8. Operation and Usage

8.1 Connections

The DIGI32 PRO has 3 external and 1 internal input and output (contact pins on the board).

The internal input serves as a connection with an internal CD-ROM drive when this is supplied

with a digital audio output. Advantage: the built in CD-ROM drive is sufficiant for digital recording

and the need for external cabling does not arise.

The actual input is activated by the registercard ‘Settings’, available through >Settings/Control

Panel/System/Device Manager/DIGI32 PRO/Properties/Settings<. DIGI32 PRO accepts all

common digital sources as well as SPDIF and AES/EBU. Channel Status

(Consumer/Professional) and copy protection will be ignored.

Connecting Chinch

(SPDIF) or XLR

(AES/EBU) devices is

done through the supplied

cable adapter. DIGI32

PRO’s ground-free de-

sign with transformers for

inputs and outputs offers

a problem-free connection

of all devices along with

perfect hum rejection.

All outputs are driven parallel, therefore you get an identical signal. In the simplest situation,

connect 3 devices at the outputs and use the card as splitter (distribution 1 to 3).

The stereo jack provides a hi-quality analog monitor output, driven directly from the digital out-

puts. A low impedance driver stage even allows the connection of stereo headphones, the

‘Level’ switch can be used to change the output level.

8.2 Playback

DIGI32 PRO sends digital audio data automatically in the parameters of the wavefile, when

the selected format is supported. Otherwise the supplying software will report an error.

Firstly the card has to be set as transmitting device in the software in use, look for Playback

Device, Device, Audiogerät etc, to be found under Options, Vorgaben or Preferences. Some

seldom found programs only use Windows' Prefered Playback Device. This setting can be

changed in >Control Panel/Multimedia/Audio<. As resolution for playback we recommend 24 bit,

because in this setting the full potential of the DIGI32 PRO is available. Drawbacks with the

16 bit operation do not arise.

'Step by Step' instructions showing the setup process of some well known programs can be

found in 'setup.htm' and 'setup2.htm' in the directory \rmeaudio.com\english\techinfo\ on the

RME driver CD.

User's Guide DIGI32 PRO © RME 7

The picture to the right

shows the smallest buf-

fer setting for a crackle-

free 24 bit operation in a

computer with 200 MHz.

More or larger buffers

produce an even higher

defence against distur-

bance, but also cause a

longer delay in playing

back the data. In case of

synchronized audio to

MIDI playback be sure to

activate the checkbox

'Get play position from

audio driver' when

available in your pro-

gram. Because the

DIGI32 PRO re-

ports the actual play

position correct (even in

record where this is nec-

cessary for chase lock sync) there will be no sync problems when working in a mixed audio/MIDI

environment even with higher buffer settings.

8.3 Record

After the DIGI32 PRO has been set up as recording device in the software being used at

the time, there are a few further points to note. Because the operating system cannot define

errors exactly, it may well be that you receive the same error message for very different types of

problems.

As opposed to soundcards which produce empty wave files (just noise) even without an input

signal, digital in/out cards must have a valid input signal to begin recording. The correct sample

frequency is also important. There is no valid input signal available when a DAT plays back a

tape which has been recorded at 48 kHz, and the recording software is set at 44,1 kHz.

Because of this peculiarity RME has given the DIGI32 PRO two unique features: an Error

LED for the active input in use and a visual display of the actual sample frequency. The Error

LED indicates wether a valid input signal is present. Whenever an error occurs (wrong input,

invalid data, signal delivering device delivers nothing) the LED will light red. As soon as a valid

input signal is present this light will go off.

The display of the sample frequency (see chapter 9, picture Properties) in the Device Manager

offers a similar function. If none of the standard frequencies like 32 kHz, 44,1 kHz or 96 kHz

come up then ‘Out Of Range’ will appear, and by an error detection ‘No Lock’.

Therefore configurating the software to perform a digital recording is child´s play. After choosing

the correct input DIGI32 PRO will show the actual sample frequency. You can now enter

this information into the corresponding dialog box of the recording program.

Additional DIGI32 PRO includes a safety function that checks the sample frequency. For

example feeding a signal with 48 kHz and trying to record with 44,1 kHz is not allowed. Otherwi-

se recordings with a wrong pitch would be the result.

User's Guide DIGI32 PRO © RME 8

The screenshot to the right shows an example

of a dialog box, in this case of the wave editor

WaveLab from Steinberg, which allowes the

use of 20 bit, 24 bit and up to 96 kHz with the

DIGI32 PRO. With this dialog box you set

the characteristics of the wave data to be re-

corded in detail.

The choice of bit resolution is optional as long

as it is supported by the hardware. You may

record only in 16 bit mode even with an input of

24 bits. Bits 17 to 24 are then ignored and the-

refore all signals 95 dB below Full Scale will be

lost without the chance of recalling them. On

the other hand recording in 24 bit from a 16 bit source brings no advantages but wastes pre-

cious memory space on the harddisk.

Normally the output of the card is switched off. Often it is helpful to monitor the input signal or

pass it on. For such cases the DIGI32 PRO is fitted with a monitor function, which can be

set in the Settings dialog of the DIGI32 PRO driver (Output/Automatic). Activating the re-

cording software using Pause or Play leads to passing the input signal direct to the output. In

some cases the record program itself handles the monitoring, the settings in 'Ouput' then won't

change anything.

8.4 Record while Play

DIGI32 PRO allows the playback of wave data during the recording of further wave data.

This feature, known as ‘Full Duplex’ or ‘Record while play‘, is unavoidable for multitrack harddisk

recording, but it must be supported by the recording software.

Full Duplex operation requires identical sample frequencies, same bit rate and same format

(mono/stereo) for the signal to be recorded and the signal to be played back!

User's Guide DIGI32 PRO © RME 9

9. Configurating the DIGI32 PRO

9.1 General

The hardware of the DIGI32 PRO includes a number of helpful options under all supported

operating systems, that allow to configure the behaviour of the card according to the actual

needs. Through the registercard ‘Settings’ you will gain access to:

• Selecting the input

• State of the output

• Channel Status of the outgoing signal

• Synchronisation behaviour

• Display of the input signal

The display of the actual input frequency is updated every 0,5 seconds. When choosing an input

with a signal including errors or without input signal the statement ‘No Lock’ appears, in case of

sample frequencies widely out of tune ‘Out of Range’ is shown. When an optical signal is

present while the coaxial input is active then you immediately see that there’s no valid signal

available. The changing / switching of the inputs happens right away and needs no further click

on OK. All parameters for the active input needed to start recording are found very quickly. With

this the tedious ‘trial and error’ to get a digital recording working becomes a thing of the past.

The three states of the output selected through the choicebox ‘Output’ are unavoidable functions

for daily use.

‘Automatic’ sets the normal mode where

the input signal reaches the output only

whilst recording. In this mode when star-

ting a recording feedback occurs very

often in studios with digital mixing desks.

‘Play only’ solves this problem by making

sure that the input signal is never passed

through to the output.

After selecting ‘Input’ the input signal

appears always at the output when play-

back is not active. DIGI32 saves a

continual recording standby mode and

can switch itself to monitoring without

active software. As the output options

operate immediately stepping through

the inputs gives a fast check of the in-

coming signals.

'AutoSync’ guarantees a fault-free functi-

on of the modes Record, Record while

Play and while using more than one card

(see chapter 10.2). In specific cases, like

a direct connection of the inputs and outputs of a DAT with the DIGI32 PRO, AutoSync

leads to a local feedback of the digital carrier. In such cases AutoSync can be deactivated to

avoid this local loop problem.

Specific information about the right choice of the Output Channel Status (Output Format Con-

sumer / Professional) can be found in chapter 11.

Changes to the settings should not be made during record or playback, as it might come to

disturbances, in some cases even to a crash. Please be aware that several programs won't stop

playback or record (technically do not close the device) even in Stop mode. Thus changing the

settings might not have any immediate effect. In general we recommend - if available - to disable

the option 'Audio active in background', and to enable 'Close Audio Device on Stop' or similar.

9.2 Windows 95™

DIGI32 PRO proves a fine example of integrating with Windows 95™'s device manager. But

accessing the DIGI32 inside the Device Manager is more complicated as it should be. To

shorten the laborious way to the registercard Settings a link is copied to the desktop

(C:\Windows\ Desktop), its icon to C:\Windows\. Using the shortcut Ctrl-Num2 (the number 2 on

the number block) or a double click on the board lets you jump straight to the Device Manager.

From there it's only a few clicks to 'Settings'. If you need continous access to 'Settings', simply

don't close it. With Ctrl-2 'Settings' gets into the foreground at any time.

9.3 Windows NT™

The official way to Settings in Windows NT™isn't easier as with Windows 95™. Because of this

the RME Driver CD comes with an icon and two programs in the directory \tools. Please copy

'digi32.ico' and 'digiconf.exe' in your Windows directory (propably C:\NT). Next make a link to

'digiconf.exe' using the icon and the shortcut Ctrl-Num2 (the number 2 on the number block).

Using the shortcut Ctrl-Num2 or a double click on the board lets you jump straight to Settings. If

the program 'digitray.exe' is started with a double click another DIGI32 icon will show up in

the systray of the taskbar. A click with the left mouse button will again open the Settings dialog,

the right mouse button ends this program. Tip: Copy 'digitray.exe' into the StartUp folder, so that

Settings is always in reach.

9.4 MacOS™

Use the Sound control panel, Sound Out, to activate DIGI32 PRO as playback device, and

set up the desired sample frequency for playback.

The Soundmanager will activate a software sample rate converter when the sample rate set up

in Sound Out does not meet the one of the played back file. For highest quality the sample rate

of the card has to be identical with that of the played back file!

10. Using more than one DIGI32 PRO

10.1 General

The Windows 95™/ NT™driver is able to communicate simultaneously with all the cards known

to the system. The driver marks them with different numbers after the device's name, like

‘DIGI32 PRO In (1)’.

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