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Thread: ALLO Audio Hardware

  1. #11
    Join Date: Aug 2016

    Location: France

    Posts: 110
    I'm Andre.

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    See here more details:

    PIANO 2.1 DAC:

    PIANO HI-FI DAC (VERSION 2.1)
    We are using 2 DAC ics PCM5142 with integrated DSP. The PurePath
    software from TI is available for download (registration required) and can
    be used to create specific filters and other audio functions.
    The board will come pre-programed as a 2.1 output (but you can create your
    own custom design and load it the board and can access the xover
    frequency directly from linux (we made a small app).
    Hardware wise, we have split the digital and analog side with LDOs and we
    feed the analog side using an extremely capable (low noise ultrahigh psrr)
    LT3042. Basically each board has 4 LDO (2 for each DAC ic) (note that
    digital side uses cheaper LDOs).
    Of course, on the analog side we used only thin film resistors and poly caps
    in audiopath.
    Key Features
    Dedicated Two no’s of 384 kHz/32bit high-quality DAC PCM5142 for best sound
    quality
    Available with different output connectors: 4 x RCA
    DAC SNR is 112dB
    DAC THD+N @ - 1dBFS are –93dB
    Full Scale Output of DAC is 2.1Vrms
    Dynamic Range of DAC is 112dB
    Sampling Frequency ranges from 8 kHz to 384 kHz
    Ultra-low-noise voltage regulators for optimal audio performance
    Integrated EEPROM for automatic configuration (with write-protection)
    Technical Specifications
    Operating Temperature Range is -25C to 85C
    The Piano 2.1 board size: LWH = 68.7mm* 65 mm*22.2mm


    VOLT + AMP :

    VOLT+ AMP
    The TPA3116/18 class D amplifier IC is a leap in terms of audio quality.
    Our board is a high quality implementation of the stock design.
    Ÿ Using TPA3118 (better grounding of main IC)
    Ÿ Anti-Pop circuit
    Ÿ Bootstrap snubber mod
    Ÿ Brand name components as per picture
    Ÿ Radio avoidance switch (to reduce interference)
    Ÿ PCB with extra copper (since on transient’s current can spike to 5A)
    Note that PCB comes in 2 flavors:
    1. Volt is a shield and beneath it has connector that will plug into our DACs
    (Piano 1.1 and Piano 2.1). It has no RCA inputs. (Capacitance Multiplier can
    be added as a standalone board).
    2. Volt+ is a standalone amplifier with RCA IN (stereo). In addition to
    everything that the Volt has, we have added a circuit in the power supply
    that will reject spikes and noise to about 60db. The name of the circuit is
    "Capacitance Multiplier". Please note that Class D amplifier needs a quiet
    PSU.
    Volt+ can be used with our DACs through the RCA input, as a standalone
    board.rrect crystal (there are 2), fixing the problems outlined in the
    beginning.

    Key Features
    This class D amplifier goes up to 2 x 50W max
    The components used are specifically designed for high end audio devices (Worth
    Inductor, TI chipset, film capacitors and 1% thin film resistors)
    VOLT AMP boasts 4 output filters, 4 EMI Snubbers, 4 bootstrap capacitors and
    gain setting components
    We are using CM filter circuits in power section to reduce maximum ripples in
    power
    We are using 10K logarithmic Potentiometer for Volume control. Available with
    different Input connectors: 2 x RCA
    Comes in two flavors
    Technical Specifications
    Chipset: TPA3118D2
    Output: 2 x 30W into a 4 to 8-Ω BTL Load
    Class D Operation: 90% POWER EFFICIENCY
    SNR: 102dB
    Supply Voltage: UP TO 24V DC
    Board Size: LWH = 82.83mm* 125.5mm * 40.2mm
    Temp Range: -40C to 85C Ambient

    KALI reclocker:

    Kali The Goddess of Time
    Every SBC has a crystal that it used to send digital signals to your DACs.
    The accuracy of this crystal is very important in how well the DAC will
    transform the digital signal into analog sounds. Simply put: a better crystal
    means a better sound! Most SBCs use a very cheap crystal with lots of jitter
    in order to save costs.
    Furthermore, there are 2 kinds of frequencies for digital files: 44.1Khz (wave
    files) and 48khz (streamed music). Some SBCs (like RPIs) can output only
    48Khz, so imagine the degradation of the sound that was recorded at a
    different frequency.
    Kali Will Solve Both of Those Problems
    First, it has a very low jitter NDK crystal feed by LDOs in series for ultra quiet
    power supply. Second, the FPGA will read the incoming stream, will buffer
    the DATA 0.7s while discarding the incoming clocks. Using the NDKs it will
    reclock the buffered data OUTSIDE the fpga (since fpgas introduce about
    200ps of jitter) and provide a MCLK/BCLK that is direct from crystal,
    providing a jitter-free (almost) to your DAC.
    Meanwhile, it will clock the file using the correct crystal (there are 2), fixing
    the problems outlined in the beginning.
    The Million Dollar Question (actually $69):
    How Does it Sound?
    Well, the music will "open up". The stage will sound bigger, more tridimensional.
    You will hear sounds, words, instruments that were drowned
    before in a sea of digital mud.
    Is it Worth it?
    Do you enjoy a better wine/microbrewery beer, or anything will do? Do you
    have some medium/good speakers or you are using the cheapest PC
    speakers? Do you love music or just want to hear some beats?
    We can’t answer the question for you. It’s your choice.
    Kali Comes in 2 Flavors
    The difference between the two is that RPI version will always buffer the
    DATA at 0.7s. It will work with any SBC's including SPARKY.
    Key Features
    The basic design includes FPGA based FIFO board, Clock generation board and
    additional board for connecting other types of inputs like SPDIF and USB along
    with I2S streams of audio
    I2S input: 44.1 KHz, 48 KHz, 88.2 KHz, 96 KHz, 176.4 KHz, 192 KHz - 16bit, 24bit or
    32bit
    I2S output: 44.1 KHz, 48 KHz, 88.2 KHz, 96 KHz, 176.4 KHz, 192 KHz - 16bit, 24bit
    or 32bit
    FIFO Memory: 4MB SRAM
    Can be use with external Crystal Oscillators for MCLK or upgraded to a higher
    quality, multi-frequency clock that comes with automatic Fs switching and better
    performance
    LED indicators (Power, Full, Lock, Empty, Sample Rate, Mclk)
    DC power supply: (5V/3A) with Filter circuits
    Multi-frequency output capability to support the full I2S working range from 44.1
    KHz to 196 K
    Automatically switching frequencies according to the input I2S signals
    Extremely fast and very low propagation delay Flip-Flops are added on I2s signals
    output from FPGA, for synchronization with MCLK before sending to DAC
    Ultra-low-noise voltage regulators for optimal audio performance
    Integrated EEPROM for automatic configuration (with write-protection)
    Tech Specs
    LED indicators (Power, Full, Lock, Empty, Sample Rate, Mclk)
    DC power supply: (5V/3A) with Filter circuits
    Operating Temperature Range is -25C to 85C
    The Kali board size: LWH = 58mm * 77.54mm * 23.8mm

    CM board:

    Capacitance Multiplier (Stand Alone)
    A Capacitance Multiplier is designed to make a small capacitor function like
    a capacitor that is much, much larger.
    This design reduces the output ripple/noise of any PSU to almost negligible
    levels (less than 5mV up to 1Mhz).
    Note this this is not a voltage regulator. The output voltage will track the
    input voltage (- dropout voltage).
    This circuit is very suitable for class A and class D amplifiers or even to feed
    clean power to your SBCs.

    Key Features
    Designed to make a small capacitor function like a capacitor that is much, much
    larger
    Reduces the output ripple/noise of any PSU to almost negligible levels (less than
    5mV up to 1Mhz)
    The output voltage will track the input voltage (- dropout voltage)
    Suitable for class A and class D amplifiers
    Suitable to feed clean power to your SBCs
    Dropout voltage is trim pot selectable

  2. #12
    Join Date: Aug 2016

    Location: France

    Posts: 110
    I'm Andre.

    Default

    so i've done a copy past of the text... now you're missing the pictures... but I can assure you, they look as good in real life as on paper (specs).

  3. #13
    Join Date: Aug 2016

    Location: France

    Posts: 110
    I'm Andre.

    Default

    Hi guys,
    I wonder if some of you have questions about our hardware, since its not a traditional sound system.
    i just want to let you know that I am available to answer any questions and hope that more of you sign up for the hardware pass around so we can get it started.
    thanks
    Andre

  4. #14
    Join Date: Aug 2012

    Location: Hartlepool UK

    Posts: 1,182
    I'm Alan.

    Default

    It looks great Anrey think I will have a dabble with that

    Alan
    Turntable - Garrard 401/Jelco 750L/Ortofon Kontrapunkt B, Pioneer PLC 590, SME 3009/2 , Denon DL103R - DIY Paradise Phono stage - Reel 2 Reel Studer A810, Otari MX55,Tascam BR20 - Digital HTPC / Young Dac - Preamp - DIY B4, 821, Power Amp's DIY Voyager Mono Block, Speakers Tannoy precision 6.4 / Wilmslow Kit Volt BM220.8 / Scanspeak D2905/9500

  5. #15
    Join Date: Aug 2016

    Location: France

    Posts: 110
    I'm Andre.

    Default

    Quote Originally Posted by 337alant View Post
    It looks great Anrey think I will have a dabble with that

    Alan
    you can take a look at our site and read more about the products.
    i also offer a discount for ArtOfSound members!
    so just PM me

  6. #16
    Join Date: Dec 2016

    Location: Auckland, New Zealand

    Posts: 5
    I'm Tony.

    Default

    @Audiohdwr I have purchased and assembled a Vana but cannot find where to download any images for the Sparky. Can you help?
    Last edited by tkr001; 10-12-2016 at 04:21.

  7. #17
    Join Date: Aug 2016

    Location: France

    Posts: 110
    I'm Andre.

    Default

    hi there.
    what image are you looking for?
    have you contacted our support team ?
    thanks
    Andre

  8. #18
    Join Date: Dec 2016

    Location: Auckland, New Zealand

    Posts: 5
    I'm Tony.

    Default

    I am looking for a version of linux to install roon bridge on. On my RPis I use diet-Pi. I tried to contact the support team re using the Piano 2.1 dac as a 2 channel dac and was told someone would contact me but they haven't.

    I have given up on the sparky for the time being and added the rest of the bundle to a RPi. Kit seems fine but documentation and support are lacking.

    Thanks for responding.

  9. #19
    Join Date: Aug 2016

    Location: France

    Posts: 110
    I'm Andre.

    Default

    Quote Originally Posted by tkr001 View Post
    I am looking for a version of linux to install roon bridge on. On my RPis I use diet-Pi. I tried to contact the support team re using the Piano 2.1 dac as a 2 channel dac and was told someone would contact me but they haven't.

    I have given up on the sparky for the time being and added the rest of the bundle to a RPi. Kit seems fine but documentation and support are lacking.

    Thanks for responding.
    hi
    we only started looking at ROON a few days ago.
    we hope to release something soon for Diet PI.
    please stay tuned.
    thanks

  10. #20
    Join Date: Aug 2016

    Location: France

    Posts: 110
    I'm Andre.

    Default

    All the best to all for 2017!

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