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iii

Introduction

Dear customer,

Congratulations on your purchase of the

INT203

Firewire I/O Interface and

welcome to the family of Weiss equipment owners!

On the following pages I will introduce you to our views on high quality

audio processing. These include fundamental digital and analog audio concepts

and the

INT203

Firewire I/O Interface.

I wish you a long-lasting relationship with your

INT203

Yours sincerely,

Daniel Weiss

President, Weiss Engineering

ltd.

Содержание INT203

Страница 1: ...NT203 Owner s Manual Weiss Engineering ltd Florastrasse 42 8610 Uster Switzerland Phone 41 44 940 20 06 Fax 41 44 940 22 14 Email weiss weiss ch Web www weiss highend com www weiss ch www asiaweiss co...

Страница 2: ...ii...

Страница 3: ...Weiss equipment owners On the following pages I will introduce you to our views on high quality audio processing These include fundamental digital and analog audio concepts and the INT203 Firewire I...

Страница 4: ...ing ltd makes no warranty representation or guarantee regarding the suitability of its products for any particular purpose nor does part of this manual and specifically disclaims any and all liability...

Страница 5: ...rates up to 192 kHz are employed In 2001 we have decided to enter the High End Hi Fi market which offers a comparable clientele to that of the mastering studios Both consist of critical and discernin...

Страница 6: ...oducts delivered 2001 Introduction of the MEDEA High End Hi Fi D A Converter the first product in our High End series 2004 Introduction of the JASON CD Transport 2007 Introduction of the CASTOR High E...

Страница 7: ...3 2 1 1 Firewire 13 2 1 2 Outputs 13 2 1 3 Inputs 13 2 1 4 Synchronization 14 2 1 5 Power Supply 14 2 1 6 Stand Alone Operation as a Digital Level Control Device 15 2 1 7 Firmware features 15 2 1 8 Fr...

Страница 8: ...2 3 1 Digital Inputs 25 3 2 Digital Outputs 25 3 3 Synchronization 25 3 4 Power 26 3 5 Level Control 26 3 6 Bit Transparency Check 26 3 7 Polarity Control 26 A Contact 27...

Страница 9: ...ttery clock introduces errors to the measurements taken by the A D resulting from measurements being taken at the wrong time One can easily observe that the level of the error introduced is higher dur...

Страница 10: ...path where internal signals can affect the jitter amount of the sampling clock generator Here all the good old analog design principles have to be applied Such as shielding from electric or magnetic...

Страница 11: ...the band between the two corner frequencies Equally in this band any jitter on this clock passes straight through to the JET PLL s clock output The stable clock is usually derived from a free running...

Страница 12: ...ich filters the audio signal ahead of the A D conversion process For the D A conversion which is of more interest to the High End Hi Fi enthusiast essentially the same filter is required This is becau...

Страница 13: ...tion filter has been transferred to the digital domain into the upsampler filters The big advantage when doing it in the digital domain is that it can be done with a linear phase response which means...

Страница 14: ...uent processor may be able to accept In this example after the upsampler there may be a D A converter with a 24 bit input word length capability So if the upsampler generates a word length of more tha...

Страница 15: ...by the music signal www weiss highend ch computerplayback nodither mp3 This is how a badly implemented digital level control works Fortunately there is a better way to handle the re quantizing One sol...

Страница 16: ...omer He publishes articles on dithering and jitter and many other topics at www digido com 1 6 Firewire vs USB Firewire is a peer to peer protocol meaning that every device on a Firewire network is eq...

Страница 17: ...o signal For hooking up your mouse keyboard or thumb drive USB is plenty fast and plenty cheap For hard drives either one will do although Firewire is somewhat more reliable For audio devices USB will...

Страница 18: ...12...

Страница 19: ...There are two Firewire connectors in order to chain several Firewire based units on a single Firewire bus Which of the two Firewire connectors is used for the connection to the computer is not relevan...

Страница 20: ...source connected via the RCA input Typically chosen when a digital audio source is connected via RCA in order to transfer audio to the computer e g for recording In all cases the INT203 will function...

Страница 21: ...ly the bit transparency check and the absolute polarity reversal switch Note if the INT203 is not connected via Firewire an external power supply needs to be connected to the INT203 2 1 7 Firmware fea...

Страница 22: ...utput connector OUT2 carries the same stereo signal output as OUT1 1 XLR input connector IN1 stereo signal input single wire mode 1 RCA input connector IN2 stereo signal input single wire mode 2 2 Ins...

Страница 23: ...17 Figure 2 2 INT203 frontpanel Figure 2 3 INT203 backpanel...

Страница 24: ...unted drive double click WeissFirewire 3 5 5 10185 pkg obvi ously this version number may increase over time 4 Click Continue 5 Select the drive usually you leave it at the defaults 6 Click Continue 7...

Страница 25: ...proper cable as required by your computer Make sure to plug in the Firewire cable in the proper orientation If the connector is plugged in reversed the INT203 can be destroyed because of the bus powe...

Страница 26: ...l see fig 2 2 is on the INT203 mutes its outputs and enters the bit trans parency check mode It is looking for specific bit patterns coming from the Firewire source I e in order to test the bit transp...

Страница 27: ...Amarra is highly recommended Amarra switches the sampling rate in AudioMidi i e in the INT203 automatically depending on the sampling rate of the file played Amarra works in conjunction with iTunes O...

Страница 28: ...he INT203 is not connected to a computer no Firewire connection the INT203 enters the stand alone level control mode In this mode the input selected with the input selector switch RCA or XLR connector...

Страница 29: ...nd recom mends an operation mode Global Settings System Various utilities to determine the chipset in your computer and to get information on the supported chipset Required for debug ging if problems...

Страница 30: ...this is usually the INT203 s Internal clock generator Operation Mode determines the stability of the system Try other modes if clicks are encountered during playback Global Settings Info Information...

Страница 31: ...ary input selection change to take effect IN1 IN2 2 Firewire connectors 3 2 Digital Outputs 1 XLR connector 1 RCA connector Professional Channel Status Data on the XLR and RCA outputs Single wire mode...

Страница 32: ...sparent i e it does not change the data in any way In all other gain positions the output signal is properly dithered to a wordlength of 24 bits All units are shipped with a 0 dB gain setting and non...

Страница 33: ...estions suggestions etc feel free to contact us at Weiss Engineering ltd Florastrasse 42 8610 Uster Switzerland Phone 41 44 940 20 06 Fax 41 44 940 22 14 Email weiss weiss ch Web www weiss highend com...

Страница 34: ...28...

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