JoeCo Cello Audio Interface

The JoeCo Cello Audio Interface is a 22 input, 4 output USB 2.0 interface designed for pro audio recording up to 384 kHz sampling rate. With its true analogue front end and tactile control surface, the Cello Audio Interface brings the classic era of electronics straight to your studio.

The JoeCo Cello Audio Interface is designed and built in the UK to allow you experience the world-renowned build quality and exceptional sound long relied upon by the world’s biggest music tours and TV shows. With 125dB dynamic range, the JoeCo Cello offers an irresistible invitation to take advantage of one of the audio industry’s most advanced feature sets. The cutting-edge specification includes a carefully curated selection of dedicated effects for JoeCo Cello‘s new preamp design, developed in-house by JoeCo. Adaptive Conversion technology, offering new ADC and DAC filtering options, enables users to tailor the performance of their JoeCo Cello depending on their choice of sample rate and the source they are recording. The exclusive Top+ algorithm provides high-end sparkle for added energy and expanse. In addition, JoeCo’s already world-famous clocking algorithms have been rewritten especially for JoeCo Cello.

Also included are a built-in talkback microphone and monitor controls. At the front end, the two microphone inputs include discrete analogue mic preamps with 80 dB gain, Hi-pass filter, Pad and Phase Reverse, with two dedicated preamp-only channels to ensure signal purity. Inserts points are incorporated in both mic channels for outboard equipment. S/PDIF and 16 channels of Adat Lightpipe input are provided for use with external preamps. Mastering grade monitor outputs ensure the best results, while the unit can also accept external wordclock. All of this comes in a compact interface that sets a new standard in digital conversion clarity and sonic imaging. With sharp stereo and unequalled transient accuracy, the JoeCo Cello can handle the demands of high-end sound design with ease, blending authentic analogue warmth blended with the crisp precision of one of the world’s most powerful recording devices.

JoeCo Cello Audio Interface Features

• Inputs
  • 2 x Mic inputs (offering up to 80dB mic gain) with…
    • Analogue gain control
    • Phase reverse
    • Analogue pad
    • Analogue hi pass filter
    • 48V phantom power
    • Balanced line level insert sends for analogue outboard
    • Selectable Top+ feature to add subtle high frequency lift
  • 1 x Hi-Z Instrument input (adjustable analogue gain with control knob)
  • 2 x Balanced line inputs / insert returns (adjustable gain with control knob)
  • 16 Channel of ADAT digital input
  • SPDIF digital input (Optical or Coax)
  • Word clock input (coax)
• Outputs
  • 2 x Balanced outputs (with master volume controlling stereo master output)
  • 2 x Stereo Headphone outputs (with independent low latency headphone mixes)
  • SPDIF digital output
• Other features
  • Class compliant USB 2.0 interface to MAC/PC
  • MIDI in / MIDI Out
  • Talkback mic built in
  • Core product features
  • Operation at up to 384k
  • Outstanding 125dB convertors with exceptional signal to noise ratio
  • JoeCo “hyper-stability” clock algorithms deliver outstanding jitter performance
  • Discrete analogue mic pres for optimum A/D conversion with separate line inputs
  • Mastering grade monitor outputs
  • Built in talkback microphone and monitoring control
  • User selectable ADC filtering options
  • JoeCo Control app for MacOS and Windows

JoeCo Cello Audio Interface Specifications

• Microphone Pre-Amplifier (Measured to Insert Send):
  • Mic Gain: +5 dB to +78 dB via Combo XLR; Range includes Pad In & Out
  • Line Gain: -10 dB to +65 dB via Combo TRS Range includes Pad In & Out
  • Phantom Power: 48 VDC Up to 10mA / Channel
  • Mic EIN: -127 dBu (with 150R Z Source)
  • CMRR: > 80 dB (1kHz)
  • Maximum Input Level: +22 dBu via Combo-XLR; +30dBu via Combo-TRS (with Pad)
  • Input Impedance (Mic): > 2.4 k Ohm Combo XLR
  • Input Impedance (Line): > 12 k Ohm Combo TRS
  • Frequency Response: +/- 0.3 dB 10Hz to 70kHz
  • Crosstalk: Better than 90 dB Rejection @ 10kHz
  • THD+N @ 0 dBu (1kHz): -103 dB (22Hz to 20kHz) Referred to +22 dBu; Av = 5 dB ; Pad In
  • Signal to Noise Ratio: 117 dB (22Hz to 20kHz) A-Weighted Referred to +22dBu; Av = 5dB ; Pad In
  • Pad: 20 dB
  • HPF: FC (-3dB = 100Hz) 20 dB / Decade First Order 20 dB/Decade
  • XLR: Pin 2 (Hot), Pin 3 (Cold) & Pin 1 (Shield)
  • 1/4” Jack: Tip (Hot), Ring (Cold) & Sleeve (Shield)
• Instrument In (Measured to SPIDF Out):
  • Instrument Gain: Infinity to +20 dB
  • Maximum Input Level: 24 dBu
  • Input Impedance: 1 M Ohm Unbalanced
  • Frequency Response: +/-0.2 dB, 10Hz to 20kHz
  • THD+N @ 0 dBu (1kHz): -107 dB, 0.00045%
  • Signal to Noise Ratio: 113 dB, 0.00022%
  • 1/4” Jack: Tip (Hot) & Sleeve (Shield)
• Insert Sends (Mic Pre Out):
  • Maximum Output Level: +22 dBu
  • Output Impedance: 200 Ohm Balanced
  • 1/4” Jack: Tip (Hot), Ring (Cold) & Sleeve (Shield)
• ADC Line Inputs (Insert Returns) (Measured at Optical Output Under AES-17):
  • Maximum Input Level: +22 dBu
  • Digital Reference Level: 0 dBFS = +22 dBu
  • Input Impedance: 10 k Ohm
  • Frequency Response: +/- 0.3 dB 10 to Nyquist Frequency (70kHz at Octal Sample Rates)
  • THD+N @ -1 dBFS (1kHz): -106 dB rel +22 dBu
  • Dynamic Range: 120 dB rel +22 dBu
  • 1/4” Jack: Tip (Hot), Ring (Cold) & Sleeve (Shield)
• DAC Outputs (1-2) (Measured from Optical Input Under AES-17):
  • Maximum Output Level: +22 dBu
  • Digital Reference Level: 0 dBFS = +22 dBu
  • Output Impedance: 200 Ohm Balanced
  • Frequency Response: +/- 0.3 dB 10 to Nyquist Freq (70kHz at Octal Sample Rates)
  • THD+N @ -1 dBFS (1kHz): -104 dB
  • Dynamic Range: 127 dB
  • 1/4” Jack: Tip (Hot), Ring (Cold) & Sleeve (Shield)
• Headphone Outputs (1 & 2), (Measured from Optical Input Under AES-17):
  • Maximum Output Level: +17 dBu
  • Digital Reference Level: 0 dBFS = +17 dBu
  • Output Impedance: 200 Ohm Balanced
  • Frequency Response: +/- 0.3 dB 10 to Nyquist Freq (70kHz at Octal Sample Rates)
  • THD+N @ -1 dBFS (1kHz): 0.0018% -95 dB rel +17 dBu
  • Dynamic Range: 108 dB
  • Max Level Into 600 Ohms: 0.0056% -85 dB
  • 1/4” Jack: Tip (Left), Ring (Right), Sleeve (Shield)
• Digital I/O:
  • ADAT 16 Channels: 44.1 - 48kHz
  • ADAT 8 Channels (SMUX): 88.2 - 96kHZ
  • Stereo S/PDIF: 44.1 - 192kHz
• USB2.0 High Speed:
  • No. of Input Channels 20: 6 Analogue, 16 Digital
  • No. of Output Channels 24: 6 Analogue, 2 Digital
  • Connector: USB2.0, Type B
  • Cables: USB2.0 Type B to USB2.0 Type A (1.8m)
• Cello Mixer Roundtrip (In to Out) Latency (Dscope Measured):
  • 44.1 kHz: 1.2ms
  • 48kHz: 1.1ms
  • 88.2kHz: 458us
  • 96kHz: 417us
  • 176.4kHz: 229us
  • 192kHz: 209us
  • 354.8kHz: 42us
  • 384kHz: 38us
• DAW Playback Latency; 32 Sample Buffer for Software Instrument Playback (Logic Estimate):
  • 44.1 kHz: 3.4ms
  • 48kHz: 3.2ms
  • 88.2kHz: 2.7ms
  • 96kHz: 2.6ms
  • 176.4kHz: 2.3ms
  • 192kHz: 2.3ms
• DAW Roundtrip Software Monitoring Latency; 32 Sample Buffer (In to Out), (Dscope Measured):
  • 44.1 kHz: 10ms
  • 48kHz: 8.5ms
  • 88.2kHz: 6.1ms
  • 96kHz: 5.9ms
  • 176.4kHz: 4.8ms
  • 192kHz: 4.6ms
  • 354.8kHz: 3.7ms Linear regression
  • 384kHz: 3.6ms Linear Regression
• Power Supply: 5V DC Centre Positive DC Adapter (2.1mm) - 1.5Amps. Internally Conditioned to Provide +48VDC, Bipolar & Low Voltage Rails for Digital Processing Core & Converters. Can be Bus Powered from Hosts Able to Supply 1500mA.
• Physical Dimensions:
  • Weight (Unit): 1.1kg
  • Weight (Packaged): 1.6kg
  • Size (Unit): 221mm (w) x 72mm (h) x 150mm (d)
  • Size (Packaged): 254mm (w) x 158mm (h) x 208m (d)

JoeCo Cello Audio Interface Includes

• 1 x JoeCo Cello Audio Interface
• 1 x Power Supply
• 1 x Mains Power Adapter
• 1 x USB2.0 Cable
• 1 Year Warranty