DAC Symphony

Dramatically reduced the level of digital noise.
Reduced impact of interconnect.
Special power supplies provide a very clean and smooth power.
2 types of digital filters - linearphase and minimum phase.
2 S/PDIF and/or AES/EBU inputs.
Input impedance of 75 ohms or 110 ohms.
Input data word lenght from 16 to 24bit.
Sampling frequency from 32 to 192 kHz.
Automatically switches and displays the sampling frequency.
Stereo analog outputs true-balanced (XLR) or unbalanced (RCA).
Output impedance 600 ohms.
Output voltage 1.7 V rms.
Frequency range 15-45000Hz (-3dB).
Dynamic range > 120dB.
Distortion <0.001%.
Out-of-band noise (50kHz-100MHz) <-90dB.
Power supply AC 220V/50Hz or DC 12V.
Very small size and weight.


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“Dynamic Element Matching for High-Accuracy Monolithic D/A Converters” RUDY J. VAN DE PLASSCHE. IEEE JOURNAL OF SOLID-STATE CIRCUITS, VOL. SC-11, NO. 6, DECEMBER 1976

Top quality TDA1541 DAC

Article from IEEE journal and datasheet about PCM58

AN 18-BIT DAC FOR CONSUMER APPLICATIONS” By F.J. Highton and K. Ito, 1988

Articles and patents about SONY (NTT develop.) MASH DACs.

“A 17-bit Oversampling D-to-A Conversion Technology Using Multistage Noise Shaping” YASUYUKI MATSUYA, KUNIHARU UCHIMURA, ATSUSHI IWATA AND TAKAO KANEKO. IEEE JOURNAL OF SOLID-STATE CIRCUITS, VOL. 24, NO. 4, AUGUST 1989

US Patent 5,021,788
US Patent 5,073,778
US Patent 5,148,168

Excellent sounding DAC based on CXD1244S & TDA1541A

DAC Overture v3.0 (Delicacy & Drive) (in English)

From article http://overture.org.ua/?p=238
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Electrolytic capacitors are constant part of power supply of audio devices, but in terms of sound he does not bring anything good, dispersion of sound quality-type of electrolytic capacitor is very large. Sonically the best types of electrolytic caps are Nichicon KZ, FG, Panasonic Pureism, Black Gate FK, NX, Elna Cerafine, Silmic II, Silmic,but the attempt to eliminate from PSU electrolytic capacitors was very successful, instead is used "electronic capacitor" (right side of the circuit).
It is global negative feedback free electronic substitutes, that has a low and stable impedance 0,1...0,2Ohm (equivalent to cap 40000u) in the band to megahertz shunting NP0 0,1 microfarads Murata GRM31 in close to chips, it completely detach regulator (317\337) from load, therefore we have the ideal transient response when load "changes", and dont have noise and output...

My blog in Russian language is here www.overture.org.ua (Google tnanslation)


DAC Picardian chord v1.0 High end 24/192 DeltaSigma DAC

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A brief description of how the D/A conversion works(not finished) Integrating, String, Floating point, binary weighted, DEM, CC, R-2R, Segmented, SignMagnitude

Electrotraining of electrolytic capacitors Electrotraining greatly improves the sound of electrolytic capacitors

DAC Overture v2.3 DAC based on high quality DF CXD1244S and DAC TDA1541A

I/U stage for current output multibit DACs I/U stage with negative feedback only in audio band

DAC Overture v2.1 CXD1244S/TDA1541A DAC

My old radiohobbys programs Regulator Design 1.3, Transformerless stabilizator 1.0
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