The Well-Tempered Computer, an introduction to computer audio

Sunday, August 17, 2014

432 EVO music server

432 EVO € 1699

Fan less music server based on Vortexbox
Clients: MPD/Squeezebox/DLNA
Control: Android tablet (7” tablet included)
SOtM USB card

USB (24/384 & DSD) USB Audio Class 2 compliant

Size: 435 x 325 x 60mm (W x D x H)
This box is called 432 because the manufacturer strongly believes classical tuned at 432 Hz sounds better.
A plugin in supplied to change the tuning of any recording to 432 Hz.

Thursday, July 17, 2014

Marantz NA-11S1

Marantz NA-11S1 € 3999,-

A very versatile player:
Streaming: AirPlay / DLNA (certified V1.5)
Internet: Spotify /
USB DAC: asynchronous USB 24/192 (driver for Windows)
USB port for iDevices
DoP (DSD over USB) DSD64/128
File formats: MP3 / WMA / AAC / ALAC / WAV / FLAC / FLAC HD
Remote app: iDevice / Android
Gapless playback

Inputs: Ethernet, coax , optical USB
Outputs: RCA / XlR /headphone

Wednesday, May 7, 2014

Oppo HA-1 Headphone Amplifier

Oppo HA-1 Headphone Amplifier US$ 1,199.00

Discrete Class A Balanced Headphone Amplifier
Asynchronous USB DAC Up to 384 kHz and DSD256
Stereo Pre-Amplifier with Home Theater Bypass
Compatible with iPod/iPhone/iPad and Bluetooth
Bluetooth also supports the APTX codec.
A remote control app is available for both Apple's iPhone and Android-based smartphones.

Analog inputs: RCA/XLR

Digital inputs:
Coaxial, Optical, AES/EBU 44.1 kHz, 48 kHz, 88.2 kHz, 96 kHz, 176.4 kHz, 192 kHz with 16/24 bit word length
Stereo PCM:
44.1 kHz, 48 kHz, 88.2 kHz, 96 kHz, 176.4 kHz, 192 kHz, 352.8 kHz, 384 kHz
16-bit, 24-bit, 32-bit word length
Stereo DSD (DoP v1.1 or native)
2.8224 MHz (DSD64), 5.6448 MHz (DSD128), 11.2896 MHz (DSD256, native mode only)

Mobile USB Audio Input (USB A Type)
Stereo PCM 44.1 kHz, 48 kHz

Profile USB 2.0, USB Audio 2.0 (driver for Windows available)

Bluetooth 2.1+EDR
Profile: iAP, SPP, AVRCP, A2DP
Audio: SBC, aptX

Analog output: XLR/RCA

Headphone output: Jack (0.7 Ohm), 4 pin XLR (symmetrical, 0.5 Ohm)

Wednesday, April 30, 2014

Auralic Aries

Auralic Aries $1599/€ 1499

Streaming audio player supporting PCM up to 384 kHz and DSD up to 5.6448 mHz.

Streaming: uPnP Qobuz WiMP Songcast AirPlay
FIle formats: AAC,  AIFF,  ALAC,  APE,  DIFF,  DSF,  FLAC,MP3,  OGG,  WAV,  WV  and  WMA
Sample rates: PCM in 44.1KHz – 384KHz at 16 ‐ 24bits, DSD 2.8224MHz and 5.6448MHz

RJ45 Gigabit Ethernet,
Dual Band 802.11ac Wireless
USB 2.0 High external HD

USB 2.0 High‐Speed for compatible USB DACs,

AURALiC Lightning DS App on iOS, Android, OS X and Wind
UPnP compatible control points

Clock: Dual 240fs  Femto Clocks
Power: 10uV  Low  Noise  external  PSU

Aries LE has the same specs but simpler clocking and PSU ($999)

Friday, April 11, 2014

Bryston BUC-1 USB Converter

Bryston BUC-1 USB Converter $750

  • Native 24 bit resolution at sampling rates of up to 192 kHz
  • Asynchronous USB receiver
  • Controls master timing of the audio system
  • Outputs transformer coupled
  • Input sample rate indicators
  • Ultra low noise linear power regulation
  • 2.25” H x 5.63” W x 8” D
  • 57.15mm H x 142.88mm W x 203.2mm D

Sunday, April 6, 2014

Audiobyte Hydra X+ USB to SPDIF converter

Audiobyte Hydra X+ €699.00

- asynchronous operation
- DSD compatible
- Lithium Polymer nano , low noise battery technology
- 384k/24 bit on all outputs (optical could be limited to 96k)
- bitperfect operation
- Native on Linux, Mac
- Windows drivers available
- I2S/DSD output , LVDS compatible

Monday, February 3, 2014

Gato Audio DIA-250 Integrated Amplifier $4,500

  • 2x 250W@8ohm / 2x 500W@4ohm
  • Class D output stage
  • Built in 24bit/192kHz D/A converter with upsampling
  • Coax, optical and asynchronous USB digital input up to 24bit/192kHz
  • Accepts digital streaming directly from Apple iPad
  • Two unbalanced and one balanced inputs
  • Nonmagnetic enclosure
  • Direct function; enables use in home theater sytems

Linnenberg VIVACE

Linnenberg VIVACE €1'690

ES9018 ESS Sabre DAC

femto master clock with a clock accuracy of under 0.1ps clock jitter

Sampling frequencies PCM : 44.1, 48, 88.2, 96, 176.4, 192, 352.8, 384 kHz
S/PDIF – input limited to 192 kHz max.
Resolution PCM : 32bit
Resolution DSD : DSD64 (2.8224MHz) and DSD128 (5.6448MHz) over DoP protocol
Master clock jitter : 82 fs (femto seconds)
Frequency response : DC - 24kHz +0.1dB -0.5dB
DC – 70kHz -3dB @192kHz or DSD
Distortion and noise : <0 -="" .002="" 0db="" 10hz="" 20khz="" p=""> Dynamic range : 130dB
Output level : 2V rms single ended / 4V rms balanced
Output impedance : 100 Ohm per phase

Mains voltage : 100V - 240V
Power consumption : 9W, < 0.5W stand by
Dimensions (H x W x D) : 51 x 165 x 226 mm

Clones Audio Sheva DAC

Clones Audio Sheva DAC €1799

 Digital Inputs: AES/EBU, S/PDIF, BNC,Toslink, I2S and USB
• 2 stereo analog outputs, one on XLR one on RCA
• 100steps fine setting via rotary encoder (digital domain) control main output

Frontpanel controls:
• Dot Matrix display for display of sampling rate, input source, audio level, filter type
• Rotary encoder with push switch

Special features:
• DSD 64/128 and DXD (384KHz 24bit PCM) compatible
• Ultra-Low Phase Noise Femto Master Clock
• Power supply has separate torroidal transformers for Analog and Digital section.

Sampling rates:
• AES/EBU, COAX, OPT up to 192kHz
• USB/I2S: PCM 44.1, 48, 88.2, 96, 176.4, 192, 352.8, 384kHz; DSD64, DSD128

Thursday, January 16, 2014

Bladelius Miner €3.000

Bladelius Miner €3.000

  • 2 pc Toslink input
  • 2 pc spdif input
  • 1 pc analog input
  • 2 pc USB
  • 1 USB togo
  • Analog input
  • Headphone out
  • Pre out
  • Ethernet
  • Wifi
  • Supports 32bit/384khz
Expansion port (future external boxes)
CD player optional
Plays from WIMP, Spotify, Nas, USB Etc

iPad App released soon.

Eclipse TD-M1 $1.300

Eclipse TD-M1 $1.300

Full range driver with NOS DAC and Class D amp.
Airplay (16 bits / 48 kHz)
Async USB (24 bits / 192 kHz)
3.5mm analog Aux

Nagra HD DAC €19.900

Nagra HD DAC €19.900

Astell&Kern AK10 Headphone Amp/DAC $299.00

Astell&Kern AK10 Headphone Amp/DAC $299.00

DAC: Wolfson WM8740 24-bit DAC

  • IOS: iPhone5th, iPod touch 5gen (Max 24bit, 48kHz)
  • Android: Galaxy S3, S4, Note2 (Max 16bit, 44.1kHz)
    Note3 (Max 24bit, 96kHz)
    Supports up to the JellyBean 4.1.2 OS / OTG Support
  • Windows XP, Windows Vista,7,8 (32/64bit) (Max 24bit, 96kHz)
  • Mac OS X 10.6.5 and up (Max 24bit, 96kHz)

Friday, December 6, 2013

Motherboard for audio

Gigabyte is the first company known to me selling a mobo with audio quality as a sales argument.
It features a dedicated USB port with clean power.
The onboard audio has socketed op-amps and adjustable gain.
They also claim to shield the analog components from noise at PCB level.

Gigabytes GA-H81.Amp-UP

Saturday, November 23, 2013

Hegel Super headphone amplifier

Digital inputs: USB micro
Outputs: mini-jack (analog) + optical mini-jack (digital)
USB interface: up to 24 bit / 96 kHz, plug & play
Noise floor: -140dB
Output impedance: Below 1 ohm
Dimensions: 1,6 cm x 4,1cm x 8,2cm / 0.6” x 1.6” x 3.2” (HxWxD)

Website: Hegel
Price: $399