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Everything In Music Since 1958
Everything In Music Since 1958

Keith McMillen K-Mix BLUE Programmable Mixer and MIDI Controller

Out of Stock
Original price $780.00
Original price $780.00 - Original price $780.00
Original price $780.00
Current price $599.00
$599.00 - $599.00
Current price $599.00
About Inventory Status

Call or text us at 301-946-8808.

In stock: It is in stock and available to ship or pickup. Apparel must be shipped from another location and is not available for in-store pickup. We can usually ship or have these items available for pickup by the next business day if they don't require inspection, special handling, or setup. Our pickup location is 11151 Veirs Mill Rd. Silver Spring, MD 20902.

📆 Preorder: It is on the way to our warehouse. We can't predict when preorder items will arrive due to current supply chain issues. If you place an order for one of these items someone will contact you to estimate the delivery date.

Out of stock: We don't currently have it available but you're not out of luck yet. We still may be able to get it. If you order one of these items we will contact you with an estimated fulfillment date. You have the option to cancel the order if you change your mind.

Special order: The item is so special that it needs to be custom ordered for you. Some of these items are works of art and have to be made individually. Orders for special order items must be prepaid and we cannot accept cancellations or refunds.

█ Sold out: We don't think we can get this item because it was either discontinued by the manufacturer or was limited in quantity. If you want or need this item call or text us. Sometimes we can help you track down the item through other sources or help you find something similar.

About Item Conditions

Call or text us at 301-946-8808.

New: The item is brand new as received from the manufacturer with a full manufacturer warranty. Instruments such as guitars, snare drums, drum kits, brass and woodwind instruments may be opened for photography and quality control inspection and may not be in a factory sealed box.

Mint or Open Box: The item may have been opened and tested but has been repackaged. The original packaging may have superficial issues but the item itself and any originally included accessories are in perfect, like new condition.

Display Model: These items are so cool that we put them on display in our legendary shop. The condition is brand new as received from the manufacturer with manufacturer warranty. Rest assured, these items undergo a very careful inspection before shipping.

Demo: These items have been on our sales floor for demo purposes and will likely show signs of use. The original packaging may no longer be included, but you can be assured that you are receiving an awesome item and an awesome price.

Used: The item is used. These item may have varying degrees of wear. Please read the description for information about the condition of the item. Used items do not carry a warranty.

B or C Stock: Factory refurbished. These items were purchased from the manufacturer in a refurbished condition. They will show some cosmetic issues, but nothing that would impact performance. Being that these are sealed from the manufacturer, we generally do not open these to photograph the cosmetic issues. They are guaranteed to work and may have a limited warranty or you may purchase an extended warranty in some cases. Please see the listing description for item specific information.

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High Performance – The Keith McMillen K-Mix BLUE Programmable Mixer and MIDI Controller

K-Mix BLUE is a performance upgrade of the K-Mix high-quality 8 × 10 digital mixer, USB audio interface, and advanced touch-sensitive MIDI/DAW control surface.

  • Upgraded, ultra-accurate and low noise µPre preamps
  • New ultra-durable ABS-Polycarbonate finish
  • Full Ableton Live 11 control surface integration

Digital Mixer

  • High Pass Filter, three band EQ, gate, and compressor on every channel
  • On-board reverb with dedicated send/return bus
  • Flexible routing to four stereo output buses and USB
  • Headphone monitoring of channels, busses, or a dedicated mix
  • Standalone Quad, 5.1, 7.1 and Octo Surround Mixer
  • Onboard preset storage
  • No computer required

Audio Interface

  • USB bus powered
  • Ultra-low noise µpre preamps
  • High-end AKM converters
  • 32-bit floating point signal path
  • 8-in/10-out audio

Control Surface

  • Ultra-sensitive precision rotaries and faders
  • User Assignable MIDI Controls in Three Banks
  • Light weight and portable
  • Rugged construction, no moving parts



  • Input Channels: 8 balanced inputs, signals up to +28 dBu
  • Output Channels: 10 Outputs (8 balanced)
  • Bit Depth: 24-bit AKM converters, 110 dB dynamic range
  • Sample Rate: 44.1 kHz, 48kHz, 88.2 kHz, 96 kHz
  • Internal Latency
    • ~2.5 ms at 69 kHz
    • ~2.75 ms at 88.2 kHz
    • ~5 ms at 48 kHz
    • ~5.5 ms at 44.1 kHz


  • Analog Inputs
    • 2 XLR/TRS combo jacks: XLR Mic/Line Inputs (balanced), Hi-Z Inst/Line 1/4” TRS Inputs (balanced)
    • 6 1/4 inch TRS Connectors (line/phono, balanced)
  • Analog Outputs
    • 8 1/4 inch TRS Connectors (balanced)
    • 1 stereo 3.5 mm TRS headphone output
    • Less than 50 Ohms output impedance
    • + 2.6 dBV max output level
  • Digital: 1 micro-USH (Audio I/O, MIDI I/0, Power), 1 mini-USB (power, Expander MIDI)


  • Faders
    • 8 channel faders (75 mm)
    • 12 LED indicators per channel fader
    • 1 master fader with 24 LED
    • MIDI position CC output on all faders
  • Rotaries
    • 4 rotary controls (360°)
    • 16 LEDs per rotary
    • MIDI position CC output on all rotaries
  • Buttons
    • 9 Channel Select Buttons
    • 4 Bank Select Buttons
    • 17 Function Buttons
    • MIDI note output on all buttons

Mic Preamps

  • Number: 2 µPre mic pres
  • Phantom Power: + 4 8V or + 12 V phantom power
  • Gain: + 60 db additional gain
  • THD + Noise: -105.12 dBu at 0 dB gain, 20Hz–20kHz (unweighted); -116.49 dBu at 0 dB gain, 20Hz–20kHz (A weighted)
  • EIN: -127.0 dBu, 150ohms at 20 Hz–20 kHz max gain (unweighted)
  • Frequency Response: ± 0.03dB at 20Hz–20kHz (44.1kHz, unweighted); ± 0.15dB @ 20Hz–40kHz (96kHz, unweighted)


  • Equalization: 3-band semi-parametric EQ, ±18dB cut/boost
  • Compressor: Compressor/Limiter on each channel, adjustable threshold, attack, release, and makeup gain
  • Gate: Noise gate on each channel, adjustable threshold, attack, release, and gain reduction
  • Reverb: Master reverb with individual sends per channel
  • Surround: Quadraphonic, 5.1, 7.1, and Octophonic surround output, each channel assignable to one of four surround panners, optional bass management crossover

Manufacturer: Keith McMillen
SKU: I691864-N-0-WHXC
UPC: 013964759488

We are Chuck Levin's Washington Music Center

Maryland, Virginia, and Washington DC's legendary music shop. Family-owned and operated since 1958. Buy gear the way it was meant to be bought, from a store that's been there through it all and has the vibe to prove it. We're staffed with musicians and industry experts, people that live and breathe music gear. Our mission is to help you find the right gear for your project, that thing that will bring you the most joy out of what you do. We're an authorized dealer for almost every brand, we stock items the other stores don't, so you can try before you buy. Stop by our Wheaton, MD showroom and see for yourself.

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