The Well-Tempered Computer, an introduction to computer audio

Monday, October 31, 2011


DAC connected wireless to the PC using a USB transmitter.

Input:  USB 2.0
Analogue 2 x RCA Jacks
Digital 1 x Coaxial RC Jack

  • Sample Rate 48kHz/16bit
  • THD+N 0.05% (ref 0dBFS)
  • Signal to Noise >-80dB
  • Analogue Output Level 2V
  • Coax SPDIF 500mV ± 50mV
  • Frequency Response 20Hz to 24kHz ±0.5dB
  • Digital-to-Analogue Converter Burr-Brown TI PCM1781
  • Time Delay <18ms
  • RF Band 2.4GHz
  • Transmission Range 40m (line of sight)
Price: $300
Website: NAD

Sunday, October 30, 2011

April Music Eximus DP1

DAC/Pre/Headphone amp

Digital Input:
1 USB 2.0 + driver for Win
USB receiver: XMOS (asynchronous USB audio class 2 24 bits/192 kHz)
1 I2S 100 Ohms TTL Level,
2 SPDIF coax 75 Ohms,
1 AES/EBU, 110 Ohms,
1 Toslink

Analog Input: 1 RCA, 1 MINI JACK
Analog Output: 1 RCA, 1 XLR, 1 Headphone

Receiver: Cirris Logic C58416
ASRC: TI SRC4192 (can be bypassed)

Price: US$ $3,200
Website: April Music

Ubermuzik Tiny Tube DAC V2

USB receiver: Tenor TE7022L 24 bit / 96 kHz adaptive mode USB
Tube: Shuguang Psvane Series 12AT7-T

can drive 32-300 ohm headphones
RCA out

Price: US$ 225
Website: Audiohub

Tuesday, October 25, 2011

Finite Elemente Hohrizontal 51

· Wall shelf with integrated Dock for iPod® or iPhone® and integrated sound system
· Connections for TV, Computer and MP3 players
· Chargin function for iPod® and iPhone® (except iPod 1st, 2nd and 3rd generation and iPod shuffle)
· Remote control

Frequency range: 50 - 25.000 Hz (-6 dB)
Amplifier power output: 2 x 50 W (incl. overload protection)
Power input voltage: 100 - 240 V (50/60 Hz)
Inputs:30-Pin-Dock for iPod/iPhone, Line-In, USB audio
Outputs: Composite Video
Load capacity: 10 - 25 kg (depending on the condition of the wall)
Dimensions / Weight:B 1000 x T 300 x H 51 mm / 10 kg


Monday, October 24, 2011

Chapter Audio Notepad

150W into 8 ohms a Class D amplifier
USB input
Apple's Airplay protocol.
Streaming up to 24/192 via Ethernet, 24/96 wirelessly.
Price: $2,500 (available in December)
No specs yet on the Chapter Audio website.

Friday, October 21, 2011


USB DAC with analogue out (RCA), headphone out and Toslink.
Price: £150.00
Website: Cyp
  • Supports standard sampling rates - 44.1kHz, 48kHz, 88.2kHz, 96kHz, 192kHz
  • Supports Bits : 16 Bits / 24Bits
  • Power supplied by USB BUS Power
  • The Headphone, R/L and Optical ports will simultaneously support audio output
  • ASIO driver supported
  • USB Audio Class 2.0 with asynchronus mode and driver for Win
  • 500 MIPS, 8 threads, XS1-L1 processor (XMOS)

Wednesday, October 12, 2011

Audio Pro Living LV3

Two technologies not very common in the home are combined here.
It is an active speaker so an amp per driver
You can connect it wireless to your PC or any piece of analogue using their wireless transmitter.

Amplifier: 100W + 2 x 35W digital Class D,
Adaptive biquad coefficients for EQ and DRC filters.
Thermal and short-circuit protection.
Tweeter: 3 x 1” silk dome
Midrange: 4.5”
Woofer: 6 1/2”
Frequency range: 30 – 24.000Hz
Crossover frequency (digital): 300/3000Hz (24/24dB/octave L/R)
Dimensions HxWxD: 750x220x220 mm

Built-in wireless receiver in each speaker
- Wireless full CD quality sound
- Works with both Mac and PC
- Plug ‘n play, no software needed
- Extensive multiroom possibilities
- RF band: 2.4GHz
- Sample rate: 48 KHz
- Dedicated proprietary protocol network

AudioPro website
Price:€ 1.699 (pair)

Saturday, October 8, 2011


DAC with preamp.
Asynchronous USB (24/192) with driver for Win.

Price: € 3.248
Website: B.M.C.


Normally you won’t find speakers on the Digital Audio Blog.
Nothing digital about speakers.
This one is different.
It is an active speaker with USB input allowing you to connect them straight to your PC

Analog: XLR / RCA / 3.5 mm mini stereo jack
Digital : 16/48 adaptive mode USB

Height x Width x Depth:10" (252 mm) x 6" (150 mm) x 7.5" (185 mm)
Price:  €698,- (pair)
Website: ADAM
More about active speakers

Friday, October 7, 2011

Peachtree Audio Grand Pre control center

DAC/preamp/headphone amp with volume control and defeatable tubed output.
Price: US$2995
Website: Peachtree

Manufacturers description:
  • Reference ESS Sabre32 DAC knocks jitter down to <1 picosecond for accurate sound reproduction
  • Galvanic Isolation eliminates noise generated by switching power supplies in source components
  • New asynchronous I2S 24/192 USB input provides the best connection between computer and DAC 
  • VCA gain control for minimal noise and cross talk replaces the commonly used potentiometer 
  • New Bascom King tube buffer rejuvenates poor recordings and compressed audio


DAC with volume control and remote.

Manufacturer’s Description:
  • USB, SPDIF and optical inputs, low jitter SPDIF output 
  • Balanced and single ended outputs, including volume control, drive your power amp directly 
  • Low jitter Tentlabs clock (<1ps rms jitter) feeding the sample rate converter and dedicated reclocking stages 
  • 12 independent supply regulators 
  • SRC4382 upsampler, selectable sample rate 
  • 24 bits 192kHz PCM1792 DAC, al inputs reclocked 
  • -117dB distortion at 0dBfs (thd 0,0006%) 
  • Selectable filters and phase 
  • All functions remote controlled 
  • Striking design, includes milled aluminium front panel and stainless steel cabinet 
  • USB input 16 bits 44.1 kHz or 48 kHz, no drivers required
  • All other inputs 24 bits 32 kHz up to 192 kHz
  • SPDIF output 75 ohm / low jitter / sample frequency selectable

Price: €979.00

Wednesday, October 5, 2011

Simple Audio Roomplayer


Resolution24 bits, no sample rates specified
NetworkingEthernet 10/100, 200MB/s PowerLine Homeplug AV
InterfaceController software for PC/Mac, iPhone, iPod Touch.
Digital inputsnetwork, USB port
Digital outno
Analog inRCA, 3.5 mm stereo jack
Analog outRCA, , 3.5 mm stereo jack
Operating systemnot specified
Streaming protocolnot specified
Audio formatsMP3, AAC, WAV, AIFF,FLAC ALAC

Expected to be introduced fall 2011 starting at £500.

Website: Simple Audio

Sunday, October 2, 2011

M2Tech hiFace Evo

Asynchronous USB converter used in conjunction with proprietary drivers which allow for Kernel Streaming, Direct Sound and WASAPI operation.

Sampling frequencies (kHz): 44.1, 48, 88.2, 96, 176.4, 192
Resolution (bits): 16 to 32
Inputs: USB 2.0, supply, master clock
optical Toslink™
optical ST
I2S (RJ-45)

Price: $499.00

Saturday, October 1, 2011

Berkeley Audio Design Alpha USB

  • Input: High Speed USB 2.0 asynchronous connection - type B receptacle 
  • Supported operating systems: Apple Macintosh and Microsoft Windows (Alpha USB Windows driver) 
  • USB audio class 2 compliant
  • Outputs: switch selectable, coaxial SPDIF - BNC, 75Ω or balanced AES type - XLR, 110Ω
  • Supported sampling rates: 44.1kHz to 192kHz 
  • Supported word lengths: up to 24-bit

Great care was taken in the design of the Alpha USB to isolate the noisy computer/USB environment from the digital audio output. The USB receiver and processing are powered by the computer, while the output master clocks and line drivers are powered by a separate isolated linear power supply.
Two key factors combine to achieve the excellent audio performance of the Alpha USB - the unprecedented degree of electrical isolation between the USB input connection and the audio output and the very low noise/low jitter performance of the individually tested audio output master clocks.
Source: Berkeley Audio Design

Price $1895