Home Production & Sound Cards PCX924e STEREO SOUND CARD
  • Overview
  • Specifications


Key Workflow: PCI Express stereo sound card with on-board processing for on-air automation, production and other mission-critical applications.

PCX924e is the reference stereo sound card with on-board processing designed for operating in continuous 24/7/365 use-environments, such as radio automation. Its on-board processing guarantees that audio is always processed whatever the PC CPU load is, which gives the system absolute reliability and responsiveness .

At a glance

PCX924e is the full featured stereo model of the PCX series of sound cards. Thanks to its broadcast grade specifications, its on-board processing and unrivaled reliability, PCX924e is the references stereo sound card used in radio automation applications designed by Development Partners, who use our appropriate software development kit (SDK) to benefit from all the on-board functionalities of the card. Available as part of the systems delivered by Digigram Development Partners, PCX924e can also be used as a linear PCM sound card with software applications based on standard driver interfaces.

  • PCI Express stereo sound card designed for broadcast radio
  • On-board processing available through Proprietary Digigram SDK: MPEG audio, mixing of PCM and MPEG, cross-fades, real time time-scaling
  • Proprietary Software Development Kit for controlling the on-board features
  • Interoperable with most third party software applications for audio production under Windows, through DirectSound, Wasapi, and ASIO
  • PCX cards are sold to Development partners: they design and sell the applications that include these cards

Key features

  • Stereo sound card with on-board processing: MPEG audio, mixing of PCM and MPEG, cross-fades, real time time-scaling, 3-band parametric EQ, Maximizer
  • Two balanced analog inputs and outputs, +24 dBu max level
  • One AES/EBU input with hardware sample rate converter, and one AES/EBU output
  • Adjustable input and output analog and digital gains
  • One AES11 sync input
  • Two GPI (dry contact) and two GPO (relays)
  • Support for Windows 32-bit and 64-bit (Digigram proprietary SDK, WDM kernel streaming, DirectSound, Wasapi, ASIO)
  • Breakout cables with XLR connectors for audio connectivity


  • Bus/Format: PCI EXPRESS (PCIe®) x1 (x2, x4, x8, x16, x32 compatible)
  • Size: 168 mm x 99 mm x 20 mm
  • Power requirements (+3.3V/ +12V): 1 A / 0.2 A
  • Operating: temp / humidity (non-condensing): 0°C / +50°C • 5% / 90%
  • Storage: temp / humidity (non-condensing): -5°C / +70°C • 0% / 95%


  • Analog line inputs (mono): 2 balanced
  • Maximum input level/impedance: +24 dBu / >10 kOhms
  • Digital inputs (stereo): 1 AES/EBU with hardware sample rate converter (SRC)
  • Programmable input gain:
    – analog: from –94 dB to +16 dB Ä
    digital: from –110 dB to +18 dB
  • Other inputs: AES/EBU Sync (up to 200 kHz), 2 GPI (dry contact), LTC
  • AES11 synchronization


  • Analog line outputs (mono): 2 servo-balanced
  • Maximum output level / impedance: +24 dBu / < 100 Ohms
  • Digital outputs (stereo): 1 AES/EBU, up to 200 kHz
  • Programmable output gain:
    analog: from –24 dB to +24 dB
    – digital: from –110 dB to +18 dB
  • Other outputs: 1 stereo headphone output (600 Ohms) 2 GPO (relay, 0.5 A, 48 VCC)


  • Bu
  • Internal connector: inter-board synchronization
  • External connectors:
    – 15-pin Sub-D for analog I/Os
    – 15-pin HD Sub-D for digital I/Os, Sync., and GPIO
    – 1 mini jack headphone stereo output (3.5 mm TRS female jack)

Audio specifications

  • Sampling frequencies available: Programmable from 8 to 192 kHz
  • A/D and D/A converter resolution: 24 bits
  • Supported audio formats: PCM (8, 16, 24 bits), Float IEEE754, MPEG (Layer I, II, and III up to 48 kHz) 

Analog audio performance

  • Frequency response (record + play):
    at 48 kHz: 20 Hz – 20 kHz: +0 /-0.3 dB
    – at 96 kHz: 20 Hz – 40 kHz: +0 /-0.4 dB
    – at 192 kHz: 20 Hz – 80 kHz: +0 /-1.1 dB
  • Channel phase difference: 20/20kHz: <0.2°/2°
  • Dynamic range (A-weighted):
    – analog In: >104 dB
    – analog out: > 106 dB
  • THD + noise 1 kHz at -2 dBfs:
    analog In: >-97 dB
    – analog out: <-95 dB
  • Crosstalk (Analog in or out):
    1 kHz at 24 dBu: <–115 dB
    – 15 kHz at 24 dBu: <-100 dB

Sample rate converter performance

  • Maximum frequency: 192 kHz
  • Frequency ratio: from 1:8 to 7,5:1
  • THD + noise 1 kHz at –2 dBfs: <-130 dB

Development environments

  • Maximum frequency: 192
  • Digigram management under Windows: np SDK
  • Other management under Windows:  Wave (PCM & MPEG Layer II), WASAPI, ASIO, and DirectSound (all PCM)
  • OS supported: from Windows 7 and Windows server 2003 (32-bit and 64-bit versions)
  • Main on-board processing features (with np SDK): PCM play & rec, MPEG Layers I & II play & rec, Layer III play, Float IEEE754,direct monitoring, real-time mixing, level adjustment, panning, cross-fade, punch-in/punch-out, scrubbing, time-stretching, pitch-shifting, 3-band parametric equalizer, maximizer, format and frequency conversions


  • Low OPEX: due to low failure rate and driver reliability
  • Increased system efficiency: guarantee of low latency operations and of processing power availability
  • Ongoing product support: from Digigram and its Development Partners
  • Low TCO and future-proofed