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Latest information
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The most recent versions of the firmware/software for this unit are as follows.

Firmware: V1.10 (Previously V1.01 Updated at this time)

Remote control app
  TASCAM RECORDER CONNECT: V1.3.0 (Previously V1.2.2 Updated at this time)

Software for Windows (ASIO Driver)
  TASCAM FR-AV series: V1.10  (Not updated)

We request that you always use the latest software/firmware version for this unit.
For information about the latest software/firmware, check the product page (https://tascam.jp/int/product/fr-av4/support)

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F/W V1.10 (December, 17 2025)
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< New functions >
- AUTO MIXER function has been added. For details, see "17-1. FR-AV4 V1.10 overview" in the Owner's Manual.

< Maintenance items >
- The specification has been changed so that the battery icon turns off when the unit is powered by USB and no AA batteries are installed.
- When set to 32-bit float, the track level meters did not display values exceeding 0 dB. This has been fixed.
- When MS DECODE was on, the M/S balance was incorrect. This has been fixed.
- Operation stability has been improved in other ways.

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F/W V1.01 (November, 25 2025)
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< Maintenance items >
- Changes made to the settings on input channels with EQ enabled were not applied to the audio. This has been fixed.

- Headphone volume adjustment could not be made while the USB FS Mismatch pop-up was displayed. This has been fixed.

- Operation stability has been improved in other ways.

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Remote control app TASCAM RECORDER CONNECT
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V1.3.0 (December, 17 2025)
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< New functions >
- Remote operation of the FR-AV4 AUTO MIXER function is now supported.

< Maintenance items >
- Operation stability has been improved in other ways.

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V1.2.2 (November, 25 2025)
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< Maintenance items >
- The FR-AV4 would not exit playback mode when playback was stopped from the TASCAM RECORDER CONNECT app Home Screen. This has been fixed.

- For channels with CH ENABLE turned off, REC ENABLE could not be turned on using the TASCAM RECORDER CONNECT app. This has been fixed.

- Operation stability has been improved in other ways.
 

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V1.2.1 Android only (October, 6 2025)
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< Maintenance items >
- When the device with Android app V1.2.0 entered a sleep or background state, the following errors would occur on the FR-AV2. This has been fixed.
  - ATOMOS timecode connection temporarily interrupted
  - Remote audio disconnected
 
 NOTE: Updating both the app and FR-AV2 unit is necessary to fix this issue.

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V1.2.0 (September, 25 2025)
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< New functions >
- The TASCAM FR-AV4 has been added as a supported device.

- REC-LINK function has been newly added. This allows the user to select recording devices connected to TASCAM RECORDER CONNECT for synchronized recording operations.

- A "NOTE" field has been added to iXML metadata for editing (FR-AV4 only).

- Press-and-hold operations for the Stop button are now supported.

< Maintenance items >
- Operation stability has been improved in other ways.

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V1.1.1 (November, 26 2024)
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< New functions >
- The frame rate can now be changed at any time, except when the timecode is being synchronized from an external source.
 The menu structure and operation have also been updated accordingly.
  For details on the changes, please refer to "15. Timecode functions" in the Owner's Manual.

< Maintenance items >
- Operation stability has been improved in other ways.

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V1.1.0 (September, 25 2024)
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< New functions >
The TASCAM FR-AV2 has been added as a supported device.

< Maintenance items >
The name of the app has been changed from DR-10L Pro CONNECT to TASCAM RECORDER CONNECT.

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Software for Windows (ASIO Driver)  TASCAM FR-AV series
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 V1.10 (September 25 2025)
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< New functions >
- The TASCAM FR-AV4 has been added as a supported device.