Last summer I wrote about VoltaStream ZERO an audio board powered by NXP i.MX6ULL processor, with up to 1GB RAM, a Texas Instruments DAC, and leveraging Raspberry Pi Zero form factor. The board runs a custom Linux distribution called PolyOS built with the Yocto Project, and including shairport-sync, librespot, SqueezeLite, a DLNA renderer, and more.
Polyvection, the company behind the project is now back with VoltaStream AMP1 audio development board, with half the board very similar to VoltStream ZERO, and the other half featuring an audio amplifier, and a wireless module for WiFi and Bluetooth.
VoltaStream AMP1 board specifications:
- SoC – NXP i.MX6ULL ARM Cortex-A7 processor @ 996 MHz
- System Memory – 512 MB DDR3
- Storage – micro SD card slot
- Audio
- 1x I2S for integrated DAC and AMP, 1x I2S for GPIO access, 1x TOSLINK-IN jack
- Analog DAC – Texas Instruments PCM1862 (SNR 103 dB)
- Amplifier – ISSI IS31AP2121 / class-D / SNR 104 dB; 2x 35 Watt (2x 25 watt continuous)
- Connectivity – Dual band 802.11 b/g/n/ac WiFi and Bluetooth 4.1 (Qualcomm QCA9377)
- USB – 1x micro USB slave port (USB gadget mode supported), 1x USB type A host port
- Expansion Headers – 40-pin GPIO header with 5V, 3V3, GND, 2x UART, flexCAN, 2x I2C, SPI, I2S, 3x PWM, S/PDIF input
- Misc – Integrated button handler / accessible from header
- Power Supply – 5V via micro USB port (TBC), or 10 to 20V via barrel jack
- Power consumption – TBD (For reference: Voltastream ZERO: 0.25 Watt – Linux idle)
- Dimensions – 65 mm x 56 mm
VoltaStream AMP1 board will ship with a 100 mm external antenna with adhesive, two wooden plates for a simple case together with required screws and spacers. You’ll need to add your own power supply (30W or greater), micro SD card with 2GB or greater capacity, and of source the speakers.
The board supports the same audio specific PolyOS operating system, or a more generic PolyBian Debian based Linux distribution. Documentation including a getting started guide and schematics (PDF), as well as download links can be found in the product page, where you’ll also be able to purchase the board for 83.19 Euros plus eventual VAT, and shipping costs.
Thanks to Frederic for the tip.
Jean-Luc started CNX Software in 2010 as a part-time endeavor, before quitting his job as a software engineering manager, and starting to write daily news, and reviews full time later in 2011.
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VoltaStream AMP1 is at 59e (inc vat) for Black Friday sale.
Interesting little board, you’ll have to check the ISSI IS31AP2121 chip for full specs, here are some briefs :
Loudspeaker output power for at 24V
– 10W × 2CH into 8Ω @0.16% THD+N for stereo
– 15W × 2CH into 8Ω @0.19% THD+N for stereo
– 25W × 2CH into 8Ω @0.3% THD+N for stereo
with 12V supply don’t expect more than 10W output power.