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Why ?

We at ECdesigns are passionate about music. Our first encounter with music was with old tube radios, record players, tape recorders and later cassette recorders. I can still remember the sound of the music, even with the crackles of records or the hiss of tape it was like you were there when they recorded it.

Then in 1982 came the promise of digital music from Philips/Sony, no more crackles or hiss, true but we soon found out that there was something missing. The music was clean but seemed to lack all musical involvement. We all thought that it would be a matter of time before this would be fixed, how hard could it be ?
As the years went by there seemed little improvement, we got SACD ,DSD and HiRes but that also did not help much.

In 2002 we decided to develop audio equipment that could bring back the musical involvement we lost with digital music. Over the years we made many prototypes of DACs, Amplifiers and Speakers. Although our prototypes and products improved over the years, the musical involvement was still mostly missing. We also created a custom SD player that was very promising.

Because we were convinced that the current DAC chips were the main problem we even developed a discrete DAC module using a passive resistor matrix, the Mosaic DAC. The Mosaic DAC helped us to increase the overall sound quality and delivered a quiet background. We created some Mosaic products based on XMOS controllers over the last few years but still there was little musical involvement.

In the second half of 2016 we started a new minimalistic prototype USB DAC to reduce the complexity of our DAC. By creating our own USB firmware we could eliminate I2S and keep things really simple. When we started with our minimal design we could never have imagined it would sound so good. As it turns out Less is More, and we are very pleased with the result. Finally we can relax and enjoy the music again.

Meet the Mosaic UV USB DAC

Modular design More info
DAC module More info
USB module More info
Volume control module More info
Headphone buffer More info
Power supply More info
Mainboard More info
Bit perfect test More info
Lights out More info
Mosaic + RaspberryPi 3 More info
FAQ More info

Mosaic UV features

USB sample rates44.1 kHz - 96 kHz (UAC1)
Bit depth24 bit
Alanog output (fixed)RCA
Alanog output (variable)RCA
Headphone buffer inputRCA
Digital inputUSB - Standard B type connector
Power Supply Build-in linear power supply 230 V or 110 V
Power Supply connectorIEC 60320 C13 (F) connector
Output volume Volume 32 steps, 2 dB per step, passive
Volume indication ledsRight 8 orange leds with 4 dimmed steps each
Sample rate indication ledsLeft 4 leds yellow
LED 1 = 44.1 kHz
LED 2 = 48 kHz
LED 3 = 88.1 kHz
LED 4 = 96 kHz
USB receiver indication ledsLeft leds 5 - 8
Led 5 orange led = connected to host
Led 6 orange led = playing
Led 7 red led = host mute on / no connection to host (no other leds on)
Led 8 green led = bit perfect test led
Lights outRear push-button to select lights out mode to
switch all leds off after 10 sec
IR remote control (optional)Change volume, local mute, lights out

Mosaic UV specifications

Width33 cm
Depth21 cm
Height3.5 cm
Height with feet4 cm
Feet5 mm
Weight1.7 kg
DAC module24 bit multibit Mosaic passive resistor matrix, 2V RMS, 750 Ohm, DC coupled
Headphone module2V RMS, 8 Ohm and up, DC coupled
CPU module32 bit low power microcontroller
Signal to Noise Ratio120 dB
Total Harmonic Distortion0.001%
Channel Separation120 dB
Frequency ResponseDC - 20kHz