664 Firmware v4.01

664 with Wingman app on iPhone

664 gets a Wingman

The 664 now supports remote control via the Wingman, a free iOS wireless interface app at the App Store.

WM-Connect dongle

WM-Connect Required

Integration with Wingman requires WM-Connect, a Bluetooth Smart USB accessory by Sound Devices.

Sound Devices 664 firmware - (v4.01) provides a firmware update for the 664 field production mixer, which includes performance enhancements related to support for the Wingman wireless interface app and WM-Connect accessory.

It is highly recommended that users update to the latest version of firmware available as soon as possible.

Download the 664 User Guide. It is up-to-date with all relevant features and functionality changes provided in the latest released versions of firmware.

NOTE: Updating the 664 to v4.01 also requires updating the Wingman app to v1.01. It is important that, before launching Wingman, the 6-Series mixer is running v4.01 and the Wingman app on the iOS device is updated to v1.01. Click HERE to get v1.01 from the Apple App Store.

Last update October 18, 2016

Updates introduced in 4.01 include:

Fixed in 664 v4.01

  • Wingman meter response is sluggish when WM-Connect is connected to the CL-12 Keyboard port.

NOTE: Requires updating the Wingman app to v1.01. It is important that, before launching Wingman, the 6-Series mixer is running v4.01 and the Wingman app on the iOS device is updated to v1.01.

Fixed in Wingman v1.01

  • Wingman meter response is sluggish when WM-Connect is connected to the CL-12 Keyboard port.
  • Wingman display and metadata errors with 6-Series after the app has been brought in and out of Standby Mode.
  • iPad Pro 12.9” minor display issue in the Devices Found page.
  • Intermittent issue where Track Arm status shows incorrect state at sample rates 88.2kHz and above.
  • Track arming display inconsistencies.

Known Issues

The list below are the published known issues for the latest 664 Firmware.

  • Auto-Mute timecode modes output timecode for a few seconds after booting up from a full shutdown.
  • Sound Devices has worked directly with Delkin to identify an intermittent Media I/O issue with newer Delkin CF 500x and CF 700x cards. Delkin has confirmed that a recent change to these two cards is most likely responsible for the errors. Cards containing KZ in the serial number are susceptible to this issue and should not be used. Cards containing VB in the serial number will function correctly and are approved. Deklin CF 1000x and 1050x cards do not experience this issue and may continue to be used.

4.00 - Posted September 9, 2016


  • Support for Wingman, an iOS application by Sound Devices, LLC and the hardware accessory, WM-Connect, a Bluetooth® Smart USB dongle.
    • Wingman is a free iOS application available as a free download from the Apple® App Store.
    • WM-Connect is an optional hardware accessory that connects to the 688 USB Port via USB B to USB A adapter or directly to CL-12 Keyboard port. The Bluetooth Smart device automatically pairs with mobile devices running iOS v8.0 or later.
  • From the Wingman app, you can:
    • Remotely control Record, Stop, False Take, and Circle commands
    • View Audio Metering, Timecode, Absolute time, Record Status, and more
    • Arm/Disarm Tracks for recording and manage track naming
    • Edit metadata of upcoming, current, and up to 50 previous recorded takes, including: scene, take, notes, track names, etc.
    • Manage, Create, and Email Sound Reports


  • Intermittent Lock Up when restoring a saved Setup file.
  • Pressing Meters button from Take List>Take Edit screen returns UI to the wrong Meter View.

3.10 - Posted July 5, 2016


  • Support for 3rd party wireless control, timecode and metadata management including:
    • Timecode Systems :WAVE and PureBlend's MovieSlate® iOS app
    • Ambient® Master Lockit.
  • New menu option to disable the CL-12 Output level controls (L, R, X1 and X2). Options for MENU > CL-12 > L-X2 Gain Pots include: Enable or Disable.
  • Take Designator can now be set to any alpha character or '-' (T is default) in MENU > FILE STORAGE > Take Designator.


  • Behavior to PFL action when in Input Settings > Edit Channel # Name screen. Now when selecting the same PFL, the track name reverts to the previous entry and returns to the Input Settings screen. Selecting another PFL cancels name changes and provides immediate entry to the new channel's Input Settings screen.


  • Arming paired LR or X1/X2 tracks using the CL-12 LR, X1/X2 pots did not correctly operate on the pairs.
  • Track Name entries from Input Settings Window would not hold if that track name already existed.
  • Channels turned off from the CL-12 were reverting back to On after a power cycle.

2.12 - Posted May 5, 2016


  • Timecode LED doesn't flash when unit is off even though timecode is being maintained.
  • Timecode backup is not timing out after two hours while powered off. This is causing the timecode battery to fully drain which would result in timecode not holding for 2 hours on the next shut down.
  • Track R and Track X2, when linked to Track L and X1 respectively, are not returning to their attenuated level after Tone is toggled on and off.

2.11 - Posted February 12, 2016

Download the 6-Series Firmware Revision Notice to view PDF documentation, which fully describes new features and functionality first released in v2.11 firmware update.


  • Support for the new CL-12 Linear Fader Controller, including:
    • 12 100 mm linear input faders (Penny & Giles option with CL-12 Alaia)
    • L, R, X1, X2 level control, routing, arming, and 22-segment metering inc. limiter activity
    • 1 Com private line circuit
    • Numerous quick-access buttons to key functions inc. metadata, transport, TC, coms/returns, arming, routing, etc.
    • USB ports for keyboard and lamp
    • Three user-programmable buttons
    • A new CL-12 sub-menu
    • Plus more...

    Note: Not included with the CL-12, a micro USB power cord (5V) must be connected to the CL-12 DC Power Boost port in order to operate with the 664.

  • Added QR Codes for smart phone access to online documentation including Approved Media List and User Guide. A QR code reader app is required.
  • New User Bit mode allows jamming of External Timecode User Bits.


  • In the File List, FAT32 media files would incorrectly display modified time instead of creation time.
  • Previously, there was a date corruption issue with ExFAT formatted media containing more than 200 files.
  • Keyboard sequence involving Shift key would sometimes repeat the same character as if the key was being held down.
  • Lock up when adding notes exceeding the 200 character limit.
  • Scene name shortcut (HP + RTN) editing factory the "None" option option causing "None" to disappear and breaking Scene Increment Mode.
  • When UBits are set to one of the date modes the UU field metadata stamps were following the take number.
  • UBits UU fields are now restored after loading user setup files.
  • Added a recheck of the real time clock to prevent false “System date error detected. Please reset time and date.” messages from appearing at boot up.

2.03 - Posted February 16, 2015


  • Added [METERS + MIC] shortcut to quickly access the Time Code Jam Menu.
  • Added ability to adjust external slate mic gain. Adjust from the System/Slate Mic Gain menu or by using the [MIC + HP Turn] shortcut.
  • Added new 'Free Run Jam Once' Time Code Mode.
  • Added ability to quickly clear the entire scene list, rather than by deleting individual entries. Select the Next take in the Take List, choose EDIT, then Scene, then <Clear List>.
  • Added Word Clock In Sensitivity setting in Timecode/Sync menu, Sensitivity can be set to High or Low.


  • L-Ident tone now goes to X1 output as well as the L output.
  • Scene Name Shortcut now edits current entry rather than adds a new entry, preventing unnecessarily long scene name lists.


  • Various system optimizations and improvements.
  • User Bits UU values are now held over power cycles.
  • Incorrect file date stamp fixed when recording to exFAT-formatted cards..
  • General clean up of scene and trackname editing bugs.
  • Time Code Jam Menu display incorrectly showing a difference with drop frame.
  • Fixed lock up when media is pulled during a copy process.
  • Activating an input during record was incorrectly showing track as armed.
  • Fixed intermittent lock up related to shutting down when exFAT media mounted.
  • Fixed lock up when mounting a corrupt CF/SD Card.
  • USB port is now reset when the 664 detects an unresponsive keyboard.
  • Fixed intermittent lock up when power cycling with a keyboard attached.
  • Fixed lock up when power cycling with Daily Folder Prompt displayed.


2.02 - Posted February 28, 2014


  • New: Added new Timecode modes, 'Free Run Auto Mute' and '24h Run Auto Mute'. These modes operate just like Free run and 24h modes, but mute the Lemo LTC timecode output when recording is stopped. This can be used to roll external devices when Rec run timecode is not suitable e.g. multi-cam shoots.
  • New: Added shortcut for super-fast scene name editing. Pressing HP encoder + RTN A during record edits the current take's scene name. Pressing HP encoder + RTN A during stop edits the next take's scene name.
  • New: Added User Bit modes including support for automatically inserting the date into User Bits.
  • New: Added Headphone Preset List menu in the System menu. This adds the ability to customize how many and which HP presets show in the HP preset List. Ideal for setting up the HP preset list for reduced scrolling and quicker access to presets.
  • New: Added support for the wireless mini keyboard Rii / RT-MWK01, ideal for use as a compact remote control.


  • Fix: Lock up when deleting notes form files recorder as MP3 to one media and WAV to the other.


2.01 - Posted November 20, 2013


  • Rare issue where record bell and subsequent recorded files are distorted.

2.00 - Posted November 5, 2013


  • Added new Input Mode menu allowing ability to switch a 664 without a CL-6 connected from standard 6-channel / 10-track mode to expanded 12-channel / 16 track mode.
  • Added new Meter Views menu in the System Menu. Provides 3 user-configurable Meter Views, Meter View 1, Meter View 2, and Meter View 3. Meter Views are toggled by pressing the Meter button.
  • Ability to turn off individual Meter Views so that user can choose whether to display 1, 2, or 3 Meter Views.
  • Added LR (Wide) Meter View options for easier to read mix tracks.
  • Added new PFL Mode menu allowing ability to switch PFLs between Pre-Fade or Follow ISO Pre/Post-Fade routing.

1.06 - Posted September 13, 2013


  • New: Ability to PFL playback tracks.
  • New: Added Timezone and Daylight Savings mode to ensure correct date stamps for SD card ExFAT files.


  • Change: Daylight mode track arm boxes now have white text for greater clarity.


  • Fixed: Headphone burst noise during boot up.
  • Fixed: RTN monitoring now follows current headphone preset mono status.
  • Fixed: No Record bells in headphone monitor when monitoring the X1 X2 tracks.
  • Fixed: Deleted notes metadata now remains deleted after a power cycle.
  • Fixed: Track name edits from channel screen while recording are now applied to current take as well as next take.
  • Fixed: Several USB Keyboard connection issues.
  • Other minor improvements and fixes.

1.05 - Posted August 16, 2013


  • *Monophonic Broadcast WAV file support, up to 10-track to two cards, three second pre-roll maximum.
  • LCD Daylight Display Mode - a daylight-specific color scheme for improved readability in sunlight.
  • New solid bar metering option for further improved readability in direct sunlight.
  • Additional Front Panel button shortcuts for:
    - LCD Daylight Display Mode (HP + SELECT encoders).
    - Phrase list (HP + RTN B/C) for fast entry of notes.
    - Activating the alternating Tone mode (SELECT + TONE). If Tone Mode is set to Continuous in the menu, then (SELECT + TONE) activates L-Ident tone.
  • Track Names in Meters options (without color gradient/ramp). Selectable for either right-side or left side display.
  • When formatted in the 664, SD cards 64 GB and larger are now automatically formatted as ExFAT (in accordance with the SD Association's recommendation). All CF cards and lower capacity SD cards remain FAT32.
  • Headphone Volume or Headphone Preset default option. Sets the HP encoder to operate as headphone level or to select HP presets when rotated. Pressing the Headphone encoder momentarily activates the alternative function.

*Note: If a card not optimized for multi-channel monophonic file recording is used or if the monophonic 10 track limit is exceeded, a warning message is displayed on the LCD when starting a recording. Polyphonic mode or reducing track count is recommended.


  • Track and Scene names - maximum number of entries increased to 70. If exceeded, a pop-up message appears.
  • Editing a track name from the channel screen now edits the current track name instead of generating a new name. This reduces the likelihood of exceeding the number of allowable (70) track names.


  • Fixed - rare issue where record beeps would be replaced by noise, resulting in corrupted recording.
  • Fixed - issue where Return monitoring would change among mono, stereo, or MS depending on the Headphone selection. Now Return L goes to Headphone-Left and Return R goes to Headphone-Right.
  • Current take's track name edits were not applied to the next take when tracks are disarmed.
  • File renaming bug fixes.
  • Numerous memory card performance improvements.
  • Additional bug fixes and system improvements.

1.04 - Posted February 28, 2013


  • Digital Input Gain. Provides up to 50dB gain for AES42 or AES3 sources.
  • Peak Only Meter option.
  • Meter Peak Hold Time Off option.


  • Metering freeze. Meters would stop moving and eventually result in a subsequent lockup.
  • Faster formatting on SD cards.
  • Improved performance for SD cards up to 32 GB in size. (Note: improved performance for cards 64 GB and larger will be addressed in a future firmware release).
  • Lockup fix when rapidly connecting and disconnecting USB keyboards.
  • Lockup fix on boot up with 44.1kHz sampling rate and Tracks L and R not armed.
  • Lock up fix that occurring with tone and 44.1K sampling rates.
  • AES signals measuring 3-4 dB high on L, R, X1, and X2 tracks.

1.03 - Posted January 11, 2013

Changes introduced in 1.03 include:


  • Tone Routing menu in System Menu; ability to choose whether tone goes to X1 and/or X2.
  • Ability to name tracks directly from the Input Settings Screen
  • Shortcut (METERS + RTN A) to switch frame rate and sample rate display on Meters view
  • Added Headphone User-configurable Presets for a total of 10


  • Internal battery warning threshold comes on below 5.5v instead of 6.0V.
  • Added confirmation dialogue when loading default track names.


  • Tone L-Ident not present in headphones. When tone is active, HP monitor is always internally monitoring LRST.
  • Meter/Output Level discrepancies
  • Rare lockup bug with tone generator
  • Various other bugs

1.02 - Posted November 16, 2012

Changes introduced in 1.02 include:


  • Take and Scene name changes of current take are rippled through the next take.
  • Select encoder will act as a space insert in applicable menus, such as notes, track names, headphone presets, etc..


  • Loading Factory Default settings now has confirmation popup.
  • RTN will now cancel PFL. PFL will temporarily override RTN program when PFL is active.
  • Tone will now latch if held for 1 second as opposed to 2 seconds.


  • Various screen drawing improvements.
  • Lock up caused by rapidly activating/deactivating tone Handling of CF and SD transfer errors.
  • Scene Increment shortcut will no longer activate scene increment popup when disabled in the setup menu.
  • COM program is now sent to right headphone program when COM is active.
  • Rare MP3 playback bug where the file wouldn't playback from the Meters page.
  • External U-Bits are now jammed when jamming RX timecode.
  • Input Metering Activity when the inputs are OFF.

Please read and follow the steps below carefully. You may want to print them before upgrading firmware.

Sound Devices recommends backing up any existing audio data that may reside on the recorder. While no data on the storage is changed during the update process, it is best practice to backup the unit. In addition, it is highly recommended to save the current device settings since a firmware update can result in settings changing to factory default.

Prepare to Update

  1. Download the 664 firmware file 664_4.01.zip using the link below.
    From the zip archive, extract the file within named 664_4.01.prg file. Copy this .prg file to the root level of an approved SD or CF memory card. Do not place the file in any folder. Do not place the 664_4.01.zip file on the SD or CF card. The card must be formatted in the 664.
  2. Apply Update to 664.
  3. Power the 664 from external DC. Do not perform the update with low batteries or unstable power sources.
  4. Power down the 664 if it is already powered up.
  5. Insert the SD or CF card with the .prg file.
  6. Power on the 664.
  7. Navigate to Setup Menu option SYSTEM > Update Firmware and follow the on-screen instructions.
  8. When the update is complete the 664 will power cycle itself. The version number 4.01 will be displayed briefly on the splash screen while booting up. A message box appears "Firmware updated successfully Version:4.01". Press "OK". Please note any changes or additions to the Setup Menu (if applicable).