MiniDSP USBStreamer Box Manuale utente

miniDSP Ltd, Hong Kong / www.minidsp.com / Features and specifications subject to change without prior notice 1

USBSTREAMER

10-CHANNEL USB AUDIO INTERFACE

TOSLINK/ADAT

BOX VERSION

I2S/TOSLINK/ADAT

KIT VERSION

User Manual

miniDSP Ltd, Hong Kong / www.minidsp.com / Features and specifications subject to change without prior notice 2

Revision history

Revision

Description

Date

1.0

User manual – Initial version

20-06-2012

1.1

Mac OSx configuration

09-08-2012

1.2

Adding USBStreamer B information + Win8 setup

26-05-2014

1.3

Updated installation procedure, Mac firmware update

22 March 2016

1.4

More detailed I2S information

25 March 2016

1.5

TDM firmware details

28 Aug 2017

miniDSP Ltd, Hong Kong / www.minidsp.com / Features and specifications subject to change without prior notice 3

TABLE OF CONTENTS

Important Information ...............................................................................................................................................4

System Requirements – Windows..........................................................................................................................4

System Requirements – Mac OS X..........................................................................................................................4

Disclaimer/Warning................................................................................................................................................4

Warranty Terms......................................................................................................................................................4

FCC Class B Statement ............................................................................................................................................4

CE Mark Statement.................................................................................................................................................5

A Note on this Manual............................................................................................................................................5

1 Product Overview ................................................................................................................................................6

1.1 Firmware versions ......................................................................................................................................6

2 Connectivity .........................................................................................................................................................7

2.1 USB and optical (box and kit versions) .......................................................................................................7

2.2 I2S/TDM connectivity (kit version only) .....................................................................................................7

2.2.1 I2S/TDM Pinouts.................................................................................................................................8

2.2.2 I2S Clock lines .....................................................................................................................................9

2.2.3 TDM Clock lines ..................................................................................................................................9

2.2.4 I2S Data lines ......................................................................................................................................9

2.2.5 External power ................................................................................................................................ 10

3 Installation and Configuration – Windows ....................................................................................................... 11

3.1 Download ................................................................................................................................................ 11

3.2 USB driver installation ............................................................................................................................. 11

3.3 Loading firmware..................................................................................................................................... 12

3.4 USBStreamer Control Panel..................................................................................................................... 14

3.4.1 Status............................................................................................................................................... 14

3.4.2 Format ............................................................................................................................................. 14

3.4.3 Clock source..................................................................................................................................... 15

3.4.4 Buffer settings ................................................................................................................................. 15

3.4.5 Volume............................................................................................................................................. 16

3.4.6 Info................................................................................................................................................... 17

4 Installation and Configuration – Mac OS X ....................................................................................................... 18

4.1 Loading firmware..................................................................................................................................... 18

4.2 Configuration in Audio MIDI Setup ......................................................................................................... 21

4.2.1 I2S_TOSLINK firmware..................................................................................................................... 21

4.2.2 ADAT_I2S firmware ......................................................................................................................... 23

4.2.3 LowSampleRate firmware ............................................................................................................... 24

5 Additional Information ..................................................................................................................................... 25

5.1 Specifications........................................................................................................................................... 25

5.2 Obtaining support.................................................................................................................................... 25

miniDSP Ltd, Hong Kong / www.minidsp.com / Features and specifications subject to change without prior notice 4

IMPORTANT INFORMATION

Please read the following information before use. In case of any questions, please contact miniDSP via the support

portal at minidsp.desk.com.

SYSTEM REQUIREMENTS –WINDOWS

•1GHz or higher processor clock speed recommended / Intel® Pentium®/Celeron® family, or AMD K6®/AMD

Athlon®/AMD Duron® family, or compatible processor recommended.

•512 megabytes (MB) of RAM or higher recommended

•One free USB 2.0 port

•Microsoft• ® Windows® XP SP2/Vista/Win7/Win8/Win10

SYSTEM REQUIREMENTS –MAC OS X

•Intel Core Duo processor or greater

•256 megabytes (MB) of RAM or higher recommended

•One free USB 2.0 port

•Mac OS X 10.8 or greater

DISCLAIMER/WARNING

miniDSP cannot be held responsible for any damage that may result from the improper use or incorrect

configuration of this product. Please read this manual carefully to ensure that you fully understand how to operate

and use this product, as incorrect use or use beyond the parameters and ways recommended in this manual have

the potential to cause damage to your audio system.

Please also note that many of the questions we receive at the technical support department are already answered in

this User Manual and in the online application notes on the miniDSP.com website. So please take the time to

carefully read this user manual and the online technical documentation. Thank you for your understanding!

WARRANTY TERMS

miniDSP Ltd warrants this product to be free from defects in materials and workmanship for a period of one year

from the invoice date. Our warranty does not cover failure of the product due to incorrect connection or installation,

improper or undocumented use, unauthorized servicing, modification or alteration of the unit in any way, or any

usage outside of that recommended in this manual. If in doubt, contact miniDSP prior to use.

FCC CLASS BSTATEMENT

This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions:

•This device may not cause harmful interference.

•This device must accept any interference received, including interference that may cause undesired operation.

miniDSP Ltd, Hong Kong / www.minidsp.com / Features and specifications subject to change without prior notice 5

Warning: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant

to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection. This equipment generates,

uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may

cause interference to radio communications. However, there is no guarantee that interference will not occur in a

particular installation. If this equipment does cause harmful interference to radio or television reception, which can

be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one

or more of the following measures:

•Reorient or relocate the receiving antenna.

•Increase the separation between the equipment and receiver.

•Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.

•Consult the dealer or an experienced radio/TV technician for help.

Notice: Shielded interface cable must be used in order to comply with emission limits.

Notice: Changes or modification not expressly approved by the party responsible for compliance could void the

user’s authority to operate the equipment.

CE MARK STATEMENT

The USBSTREAMER has passed the test performed according to European Standard EN 55022 Class B.

ANOTE ON THIS MANUAL

This User Manual is designed for reading in both print and on the computer. If printing the manual, please print

double-sided. The embedded page size is 8 ½” x 11”. Printing on A4 paper will result in a slightly reduced size.

For reading on the computer, we have included hyperlinked cross-references throughout the manual. In addition, a

table of contents is embedded in the PDF file. Displaying this table of contents will make navigation much easier:

•In Adobe Reader on Windows, click on the “bookmarks” icon at the left. The table of contents will appear on the

left and can be unfolded at each level by clicking on the “+” icons.

•In Preview on the Mac, click on the View menu and select Table of Contents. The table of contents will appear on

the left and can be unfolded at each level by clicking on the triangle icons.

miniDSP Ltd, Hong Kong / www.minidsp.com / Features and specifications subject to change without prior notice 6

1PRODUCT OVERVIEW

Thank you for purchasing a miniDSP USBStreamer USB audio interface. The USBStreamer comes in two versions.

The box version can be used in two modes by loading different firmware:

•Eight channels of input/output via optical (ADAT) connectors (this is the default when the USBStreamer B box

version is shipped from miniDSP), or

•Two channels (stereo) input/output via optical (TOSLINK) connectors

The kit version can be used in three modes:

•Eight channels of input/output via I2S header pins, and two channels of input/output via optical (TOSLINK)

connectors (this is the default when the USBStreamer kit board is shipped from miniDSP), or

•Eight channels of input/output via optical (ADAT) connectors, or

•Eight channels of input/output via I2S header pins, with support for sample rates as low as 8 kHz

Typical applications for the USBStreamer include hi-fi systems and recording studios. The kit version can be built into

multichannel DACs, ADCs and digital audio interfaces, with connection to the USBStreamer via the I2S headers.

1.1 FIRMWARE VERSIONS

The function of the USBStreamer depends on the specific firmware version loaded into it. There are three firmware

versions in the software download zip file. Please confirm that your USBStreamer has the correct firmware for your

application prior to use.

ADAT

These versions of the firmware will receive and transmit eight channels of audio in ADAT format via

the input and output optical connectors. The sample rate can be 44.1 or 48 kHz. This is the firmware

loaded into the USBStreamer B (box version) when it is shipped from miniDSP.

I2S/TOSLINK

These versions of the firmware will receive and transmit eight channels of audio over the I2S

headers and two channels over the optical connectors. The sample rate can be 44.1, 48, 88.2, 96,

176.4, or 192 kHz. (All channels must run at the same sample rate.) This is the firmware loaded into

the USBStreamer circuit board (kit version) when it is shipped from miniDSP.

Low Sample Rate

These versions of the firmware will receive and transmit eight channels of audio over the I2S

headers. (The optical connectors are not active.) They will support low sample rates, down to 8 kHz,

as well as all standard sample rates up to 192 kHz.

TDM

The Time Division Multiplexing (TDM) format packetizes multiple channels of audio in one frame. It’s

similar to I2S but in multichannel .The TDM format is for 8ch audio in/out at 44.1/48k.

Each firmware version includes files with two different IDs. If two USBStreamers are to be connected to the same

computer, make sure that each has firmware with a different ID.

miniDSP Ltd, Hong Kong / www.minidsp.com / Features and specifications subject to change without prior notice 7

2CONNECTIVITY

2.1 USB AND OPTICAL (BOX AND KIT VERSIONS)

Connect as shown (for either box or kit version). The optical input and output will receive and transmit either stereo

SPDIF or 8-channel ADAT, depending on the loaded firmware.

2.2 I2S/TDM CONNECTIVITY (KIT VERSION ONLY)

I2S, or Inter-IC Sound, is a simple protocol used to carry digital audio information between digital chips (ICs) and

circuit boards. The USBStreamer circuit board provides 8 channels of I2S input and 8 channels of I2S output via a 12-

pin header. All channels can operate simultaneously at sample rates of up to 192 kHz. I2S pinouts are shown on the

next page.

Please note that I2S connectivity is intended for advanced DIY use only. You will need the knowledge to understand

digital clocking and wiring, and have access to the equipment necessary to be able to debug any issues you may run

into. (While miniDSP always tries to help its customers, it is infeasible for us to debug your circuit and wiring for

you.)

Be sure to take the following precautions when designing your I2S interface and wiring:

General I2S usage notes

•Unbuffered I2S lines must be kept short to ensure clock and data integrity.

•If driving longer lines, buffers may be required for the clock signals (MCLK, LRCLK, and BLCK).

•Observe correct grounding and shielding, and keep analog and digital grounds separated.

•Ensure that the clock ratios (as listed on the next page) are compatible with connected circuits.

Clock master

The USBStreamer always operates as clock master – that is, the clock lines are always outputs. The connected

circuitry must therefore use the clocks provided by the USBStreamer.

3.3V logic level

All lines use a 3.3V logic level. Ensure that connected circuits use a compatible level (1.8V, for example, will not

work).

miniDSP Ltd, Hong Kong / www.minidsp.com / Features and specifications subject to change without prior notice 8

2.2.1 I2S/TDM Pinouts

The USBStreamer circuit board has two 12-pin headers located between the optical ports. All I2S lines are on J1,

while J2 carries auxiliary signaling and GPIO lines reserved for future enhancement. The I2S lines are explained in

detail on the next page.

Note that all I2S lines are 3.3V logic levels. Connected circuits must use a compatible logic level.

Description

I2S data OUT Ch 1&2 / TDM Out

Ground (GND)

I2S data IN Ch 1&2 / TDM In

I2S data OUT Ch 3&4

Ground (GND)

I2S data IN Ch 3&4

I2S data OUT Ch 5&6

I2S data IN Ch 5&6

GPIO (future)

I2S data OUT Ch 7&8

GPIO (future)

I2S data IN Ch 7&8

RST (negative low)

Master clock (MCLK OUT)

GPIO (future)

Bit clock out (BCLK)

GPIO (future)

Ground (GND)

I2S frame sync (LRCLK)

5V external power

miniDSP Ltd, Hong Kong / www.minidsp.com / Features and specifications subject to change without prior notice 9

2.2.2 I2S Clock lines

There are three clock lines. These clocks are always outputs. The connected circuitry must therefore be set to run in

slave mode and accept its clocks from the USBStreamer. (The USBStreamer always runs as clock master; it cannot be

set to run as a slave.)

MCLK The master clock for both playback and recording. This pin is an output only.

LRCLK The frame synchronization clock, also known as the word clock. This clock is equal to the sampling

frequency (Fs) of the audio signal. This pin is an output only.

BCLK The bit clock (also known as shift clock or system clock). This is always equal to 64 x Fs. This pin is an

output only.

The following table summarizes the relation between the clocks. Be sure to double-check that connected circuitry

will accept the clocks at the frequencies and ratios listed here:

Sample rate (LRCLK)

Master clock (MCLK)

Bit clock (BCLK)

MCLK/LRCLK

BCLK/LRCLK

44.1 kHz

22.5792 MHz

2.822 MHz

512

48 kHz

24.576 MHz

3.072 MHz

512

88.2 kHz

22.5792 MHz

5.6448 MHz

256

96 kHz

24.576 MHz

6.144 MHz

256

176.4 kHz

22.5792 MHz

11.2896 MHz

128

192 kHz

24.576 MHz

12.288 MHz

128

2.2.3 TDM Clock lines

The clock lines are the same as per I2S above. Just a different clock rate.

Sample rate (LRCLK)

Master clock (MCLK)

Bit clock (BCLK)

MCLK/LRCLK

BCLK/LRCLK

44.1 kHz

22.5792 MHz

11.2896 MHz

512

48 kHz

24.576 MHz

12.288 MHz

512

2.2.4 I2S Data lines

There are four lines for input data, and four line for output data (as indicated in the pinout on the previous page).

Each line carries two audio channels, in either 16-bit or 24-bit format. The expected I2S data format and timing is

shown in this diagram:

miniDSP Ltd, Hong Kong / www.minidsp.com / Features and specifications subject to change without prior notice 10

2.2.5 External power

External 5V DC power can be connected to the USBStreamer via pin 12 of J2. This pin is connected with a “diode-or”

connection to the power line from the USB port. Supplying 5V DC to this pin will therefore ensure that the

USBStreamer remains powered on even when no USB device is connected.

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