The Well-Tempered Computer, an introduction to computer audio

Wednesday, July 25, 2012

Sonore exD DSD DAC

USB Audio Class 2.0 compliant DAC with native DSD playback (DoP V1)

Ultra low jitter local master clock <3pS
True asynchronous mode operation
USB Audio Class 2.0 compliant
PCM playback up to 192kHz
DSD playback of DSD64 and DSD128
Compatible with DoP v1 specification
Custom made USB to DSD and PCM module
Support for Mac OS X without special driver (10.6 and 10.7), support Audirvana Plus "Direct" and "Integer" modes
Support for Linux without special driver (Alsa version 1.0.24 or later)
Support for Windows XP, Vista and Win 7 (32 and 64 bit), driver (WDM and ASIO) will be provided

RCA unbalanced outputs
XLR balanced outputs
Output impedance: <50ohm unbalanced, <100ohm balanced
Output voltage: 2V Unbalanced, 4V Balanced

Website: Sonore
Price: US$ 1195

Sunday, July 8, 2012

Linnenberg u:c:a

Pre-amp with USB and SPDIF inputs and RCA and headphone out.

USB input uses the M2tech OEM circuit (Win/Mac) but a new receiver using the XMOS XS1-L1 is planned allowing for full USB Audio Class 2 support (Win, OSX, Linux).

DAC: TI/Burr Brown PCM1794A with TI/BB4192 sample-rate converter.
Upsampling to 192kHz, regardless of input rate. Master clock oscillator with 3ps periodic jitter. Passive I/U conversation with 0.1% precision resistors, zero feedback.

Headphones amplifier: Full discrete construction. NO OPAMPS. NO CHIPS. Volume control with selected blue Alps attenuator. 6.35mm phone jack output. 1000mW continuous sine power output. 1Ohm output impedance. Suitable for 32 – 600 Ohms cans.

Sampling frequencies:44.1, 48, 88.2, 96, 176.4, 192kHz, (plus 32kHz S/PDIF)
Resolution:Up to 32bit, (24bit S/PDIF)
Frequency response:1Hz - 24kHz +0.1dB -0.5dB
Distortion and noise:<0.01% 10Hz - 20kHz @ -10dB
Output level:4V rms
Output power:2 x 500mW continous @ 32 Ohms
Output impedance:1 Ohm
Mains voltage:115V, 230V factory set
Dimensions (H x W x D):55 x 165 x 224 mm

Website Linnenberg
Price: €1.190

Tuesday, July 3, 2012


Pre-amp with streaming audio (UPnP), digital and analog inputs.

  • UPnP™-enabled to stream audio files from any UPnP enabled server such as UnitiServe or a NAS at up to 32bit/192kHz resolution
  • vTuner 5* full service internet radio
  • Optional FM/DAB module variant available
  • Streams/plays WAV, FLAC, ALAC, AIFF, AAC, WMA, Ogg Vorbis and MP3 files
  • Gapless playback available on all lossless file formats
  • Front-panel USB port for replay of MP3 player/iPod and USB-stored audio
  • Multiple intuitive control interfaces: front panel, remote control handset and n-Stream control app
  • USB mini-b connector for software upgrades
  • High quality Burr-Brown PCM1793 DAC
  • Five 24bit/192kHz-capable S/PDIF digital inputs (2 x coaxial RCA, 2 x TOSlink, 1 x front panel mini-TOSlink)
  • 3 analogue inputs (1 DIN, 1 RCA pair, 1 x 3.5mm front-panel socket)
  • 1 line output
  • Front-panel 3.5mm headphone connector
  • OLED display for high contrast and easy visibility
  • Ethernet and Wi-Fi network connectivity
Website NAIM 
Price: € 2350