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Weiss Engineering Ltd.
Florastrasse 42, 8610 Uster, Switzerland

www.weiss-highend.com

INT202

OWNERS MANUAL

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Summary of Contents for INT202

Page 1: ...Weiss Engineering Ltd Florastrasse 42 8610 Uster Switzerland www weiss highend com INT202 OWNERS MANUAL ...

Page 2: ... 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 and interfacing These include fundamental digital and analog audio concepts and the INT202 Firewire Interface I wish you a long lasting relationship with your INT202 Yours sincerely Daniel Weiss President Weiss Engineering Ltd ...

Page 3: ...make changes to product specification or documentation without prior notice Updated manuals and datasheets are available at our website for downloading Weiss Engineering 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 discalims any and all liability including without limitation cons...

Page 4: ...rly nineties the Gambit Series was launched taking ergonomics and sonic quality to new heights The Gambit Series consists of stand alone units like Equalizer Denoiser Declicker Dynamics Processor A D converter D A converter Sampling Frequency Converter Dithering etc 40 bit floating point processors and sampling rates up to 96kHz are employed In 2001 we have decided to enter the High End Hi Fi mark...

Page 5: ...roduction of one of the first digital equalizers 1989 Introduction of one of the first digital dynamics processors 1991 Introduction of the Ibis digital mixing console built for the mix down of classical music 1993 Introduction of the Gambit Series of digital audio processors which employ 40 bit floating point processing and sport an extremely ergonomic user interface 1995 First 96kHz sampling rat...

Page 6: ...hat type of equipment can be compromised by jitter There are three types The A D Converter as described above then there is the D A Converter where the same mechanism as in the A D Converter applies and the third is the Asynchronous Sample Rate Converter ASRC The ASRC is not something usually found in Hi Fi systems It is used by Sound Engineers to change the sample rate from e g 96kHz to 44 1kHz o...

Page 7: ... able to follow the long term fluctuations of the source e g the sampling rate of the source will alter slightly over time or over temperature it will not be a constant 44 1kHz in the case of a CD But the PLL should not follow the short term fluctuations jitter Think of the PLL as beeing like a very slow reacting fly wheel Jitter handling in the INT202 Firewire Interface in more detail The Jitter ...

Page 8: ...er audio circles the two terms oversampling and upsampling are in common use Both terms essentially mean the same a change in the sampling frequency to higher values Upsampling usually means the change in sampling rate using a dedicated algorithm e g implemented on a Digital Signal Processor chip DSP ahead of the final D A conversion the D A chip while oversampling means the change in sampling rat...

Page 9: ...now frequencies above 22 05kHz which have to be suppressed so that they do not cause any intermodulation distortion in the amplifier and speakers do not burn tweeters or do not make the dog go mad Again a low pass filter which is called a reconstruction filter is here to suppress those frequencies The same applies to the reconstruction filter as to the anti aliasing filter Pass band up to 20kHz tr...

Page 10: ... is a question whether the oversampling filter built into the D A chips lives up to his her expectations If not he she can chose to design his her own upsampler and bypass part of or the whole oversampler in the D A chip This gives the High End Hi Fi designer yet another degree of freedom to optimize the sonic quality of the product Dithering You have probably not heard the term dithering in conju...

Page 11: ...d to visit the website of Mr Bob Katz a renowned Mastering Engineer and a Weiss Engineering customer He publishes articles on Dithering and Jitter and many other topics at http www digido com Firewire vs USB Firewire is a peer to peer protocol meaning that every device on a Firewire network is equally capable of talking to every other device Two video cameras on a Firewire network can share data w...

Page 12: ...nnel stereo 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 do fine if no other devices are competing with it and if you have processor room to spare But Firewire will always be able to handle more load with lower latency and no glitches because it ...

Page 13: ... is single wire Certain equipment CD transports DACs support 176 4 192 kHz sampling rates only via the dual wire interfaces In single wire mode all four connectors carry the same signal All four can be used simultaneously Synchronization The synchronization master always is the INT202 device i e the computer is slaved to the INT202 The sampling rate is set via the Weiss Firewire IO window On a Mac...

Page 14: ...nit If the remote control unit is not used the gain stays at 0dB as set at the factory 0dB means a fully bit transparent transfer The absolute phase is set to 0 i e the phase is not changed The level control is properly dithered i e there are no artefacts due to the level control A paper on the topic of digital level control including sound examples can be found here http www weiss highend ch comp...

Page 15: ...receiver Bit Transparency check switch Two XLR connectors single wire mode OUT1 and OUT2 carry the same stereo signal dual wire mode OUT1 left channel OUT2 right channel Two RCA connectors single wire mode OUT3 and OUT4 carry the same stereo signal dual wire mode OUT3 left channel OUT4 right channel Two 6 pin Firewire 400 sockets which one is used does not matter Power socket for an external power...

Page 16: ...e to 6 pin Firewire 400 INT202 side Chose the 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 INT202 can be distroyed because of the bus power on the Firewire bus After connecting the INT202 to the computer and switching the computer on and switching the INT202 power switch to on the power LED a...

Page 17: ...player software on the computer the enclosed WAV files see driver CD have to be ripped to the computer and played from the player program If the INT202 then sees the expected bits coming from such a file it flashes the power LED continuously indicating that the player is bit transparent If the LED stays lit the player is not bit transparent There are a total of 12 files supplied One set for 16 bit...

Page 18: ...switch for a few seconds toggles the operation mode to phase control In that mode the key switches the phase to 0 and the v key switches to 180 i e inverted phase Press the mute key for a few seconds again to get back to the volume control mode The phase set before is retained when switching back to volume control mode When changing the phase with the and v keys you notice a short muting of the au...

Page 19: ...s has to be connected to the INT202 and the power switch at the INT202 has to be switched to on The INT202 should now be recognized automatically In Windows tell the installation window that you do not want to check the Microsoft website for drivers and then let the drivers be installed automatically Ignore warnings concerning Windows Logo Test and continue the installation until completed You wil...

Page 20: ...ire connection are encoun tered Global Settings Info Information about the driver version Mac OSX Configure the INT202 via the Audio MIDI Setup Applications Utilities and the WeissFirewire Control Panel Applications Device Settings General The device settings should be pretty self explana tory Device Settings Firmware Loader Allows to upload new firmware to the INT202 Not used for normal operation...

Page 21: ...z 96 0kHz 176 4khz 192kHz Power Bus power from the Firewire connector or power from an external power supply 8 12V 0 2A Level Control With the optional Remote Control unit the gain can be controlled between 0dB and 60dB From 0dB to 20dB in 0 5dB steps and from 20dB to 60dB in 1dB steps In the 0dB gain position the INT202 is fully bit transparent i e it does not change the data in any way In all ot...

Page 22: ... 03 10 CONTACT For any questions 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 http www weiss highend com http www weiss ch http www asiaweiss com ...

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