Sunday, May 5, 2013

Audio Mastering for iPad - Technical specification

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iOS Compatible Audio Interfaces
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Technical specification:

  • Supported input files formats: .wav .aif .aiff .mp3 .mp4 .m4a .aac .caf .au .snd .flac

  • Supported output files formats: Lossless: .wav .aif .flac, Lossy: .m4a .mp3

  • Supported sample rates: 44.1, 48.0, 88.2, 96.0 kHz

  • Supported bit depth: 16, 24, 32

  • Dithering: Dithering with noise shaping.

  • Hardware sample rate switching: 44.1, 48.0, 96.0 (external interface) kHz

  • Processing sections (basic mode):

    Complete 32-bit high-quality audio processing algorithms.

    Linear-phase ten band graphic Equalizer with equalization range +/-6 dB with 0.1 dB steps.
    Solo mode for each band.

    Harmonic Saturator with three sets of harmonics (3, 3+5, 3+5+7).

    Three band Stereo Imaging (Low < 200 Hz, Middle 200 Hz .. 4.0 kHz, High > 4.0 kHz) with common Stereo Width level +/- 100%.

    Maximizer based on high-quality brickwall look ahead limiter with superfast gain reduction.
    Gain up to +12 dB with 0.1 dB step.
    Three fixed response speeds.
    Three level of ceiling (-0.1, -0.2, -0.4 db).

    Reducing input (before processing) up to -6 dB with 0.5 db steps.

    Separate switching on and off each processing section.
    Switching on and off for all processing.

  • Processing sections (advanced mode):

    Complete 32-bit high-quality audio processing algorithms.

    Linear-phase five band parametric Equalizer with equalization range +/-6 dB with 0.1 dB steps.
    36 fixed frequencies for each band (35, 40, 46, 52, 60, 70, 80, 90, 100, 120, 140, 160, 180, 210, 240, 280, 320, 370, 430, 500, 570, 650, 780, 920 Hz, 1.0, 1.2, 1.3, 1.5, 1.7, 1.9, 2.3, 2.7, 3.4, 4.4, 6.2, 10.8 kHz).
    Low cut filter fixed frequencies - 20, 30, 40, 50 Hz.
    High cut filter fixed frequencies - 8.0, 12.0, 16.0 kHz.
    Q from 0.5 to 2.0 with 0.25 steps.
    Solo and Mute mode for each band.
    Visualization: Twenty band spectrum analyzer combined with parametric equalizer. Switching between Input, Equalizer output, Processed output.

    Harmonic Saturator with three sets of harmonics (3, 3+5, 3+5+7).

    Three band Stereo Imaging (Low, Middle, High) with common Stereo Width level +/- 100%.
    Separation frequencies between low and middle band - 80, 105, 160, 210, 320, 420, 640 Hz.
    Separation frequencies between middle and high band - 1.4, 2.0, 2.7, 4.0, 5.2, 8.0, 10.5 kHz.
    Solo mode for each band.
    Additional modes - Mono, Swap channels, Invert phase for Left and Right channel.
    Visualization: Mid-Side vector indicator and Side channel spectrum analyzer.

    Mastering reverb.
    Amount (mixing reverb output to the main signal) 0% - 100%.
    Pre-delay 0 - 120 msec with 1 msec step.
    Decay (RT60) 0.5 - 3.5 sec with 25 msec step.
    Relative room size 0% - 100%.
    High pass filter on reverb input on 80, 105, 160, 210, 320, 420, 640 Hz.
    Low pass filter for reflected signal on 2.0, 4.0, 8.0 kHz.
    Two reverberation algorithms - Reflection and Diffusion.

    Switchable three band / single band compressor.
    Threshold from 0 db to -48 db with 0.2 db step.
    Compression ratio 1:1, 1.5:1, 2:1, 3:1, 5:1, 10:1, infinity:1.
    Attack 0.5, 1, 3, 5, 10, 30, 50 msec.
    Release 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.8 sec.
    Amplification after compression from 0 db to +12 db with 0.1 db step for each band.
    Separation frequencies between low and middle band - 80, 105, 160, 210, 320, 420, 640 Hz.
    Separation frequencies between middle and high band - 0.7, 1.0, 1.5, 1.9, 2.8, 3.6, 5.2 kHz.
    Solo and Mute mode for each band.
    Visualization: Graphical view (diagram) for level of input signal, compressed signal and compression level for each band. Three reduction level meters up to -12 db with 0.5 db steps.

    Maximizer based on high-quality brickwall look ahead limiter with superfast gain reduction.
    Gain up to +12 dB with 0.1 dB step.
    Response speed from 0.11 to 1.27 milliseconds.
    Three level of ceiling (-0.1, -0.2, -0.4 db).
    Reduction level meter up to -12 db with 0.5 db steps.

    Input level reduction separately for each channels up to -6 db with 0.1 db steps.
    Separate switching on and off each processing module.
    Switching on and off for all processing.

  • File exchange:

    Upload and download files through internal Web access service in local WiFi network.
    Exchange of audio data between applications through system clipboard (iOS General pasteboard).
    Support "Open in" for audio file from other applications.
    Option "Open file in" sends file directly to another application.
    Get and send files to Dropbox web service.
    Sharing files on SoundCloud web service.
    Access files through iTunes file share.

  • File converter:

    From sample rate 96.0, 88.2, 48.0 kHz to 44.1 or 48.0 kHz with 16 or 24 bit depth.
    Dithering with noise shaping when bit depth reduction selected.
    Function Normalize up to maximum gain without clipping.

  • Compatibility:

    Support Inter-App audio feature as node. Application can use together with others Inter-App audio host applications.

    Support Audiobus in Effects, Input or Output position.
    Support "State Saving" feature (save current application workpalce to Audiobus preset).
    Button "Record" available on Audiobus connection panel.

  • Requirements:

    Minimum iOS 7.0. Third generation of iPad and higher is recommended (especially with Inter-App audio and Audiobus). Offline processing can be done with any iPad.


Demo: