General information

This 4-in-1 firmware is valid for

The hardware revision does not affect the function nor the appearance of the device. However, second hardware revision devices require different firmware components than first revision devices. This is why different version numbers are displayed on the website (e.g. 3.71/2.65). When running a firmware upgrade, Philips software version 4.6 or later will always pick proper firmware components for the currently connected device.

To run firmware upgrades with this 4-in-1 firmware you need to use SpeechControl version 4.6 (or later), SpeechMike SDK 4.6 (or later) or PRDM 4.3 (or later).

NOTE: This firmware CAN NOT BE USED for upgrades of the SpeechMike Premium Touch SMP37xx/SMP38xx

Release notes

SpeechMike 3 and SpeechMike Premium - second hardware revision

V3.83 technical release 2024-04-16

V3.81 technical release 2023-10-24

V3.79 technical release 2023-07-13

V3.78 technical release 2023-04-17

V3.77 technical release 2022-09-15

V3.76 technical release 2022-07-07

V3.75 technical release 2021-09-23

V3.74 technical release 2021-09-02

V3.73 technical release

V3.69 technical release 2020-12-03 (non-published version)

  • IMPROVEMENT | Improved Windows 10 compatibility:  With the latest Windows 10 release, Microsoft has changed the USB audio interface. Due to that Windows 10 did no longer accept the reported default microphone level of the device during the first connection and the microphone level was set to zero (0). To overcome this issue we have adapted the firmware in order to guarantee that the correct microphone lecel is now reported to the USB host.
  • IMPROVEMENT | More reliable firmware upgrade process: We have learned that approx. 50% of all firmware upgrades were not initiated, because the device denied to upgrade the firmware for safety reasons. After re-evaluating all safety aspects, we were able to make the firmware upgrade process more reliable in that the device also allows a firmware upgrade in playback mode.

V3.66 technical release 2019-11-08

  • FIX | Fixed issue in ‘Browser’ mode for SpeechMike Premium Touch devices (LFH3700, LFH3710, LFH3720, LFH3800, LFH3810). Button changes made by user are properly saved on the device now.

V3.65 technical release 2019-08-13

  • IMPROVEMENT | Implemented a new HID-Command for switching between SM2 <-> SM3/SMP mode.

SpeechMike 3 and SpeechMike Premium - first hardware revision

  • IMPROVEMENT | Implemented a new HID-Command for switching between SM2 <-> SM3/SMP mode.

V2.60 technical release 2018-08-27

  • IMPROVEMENT | Introduction of additional custom keyboard modes:
    • Custom 1 mode: preconfigured for Windows speech recognitionon
    • Custom 2 mode: preconfigured for Dragon on Mac
    • Custom 3 mode: preconfigured for Dragon on Windows
  • IMPROVEMENT | Now left and right mouse button work also in Keyboard mode. String descriptor indexes greater than the allowed ones are filtered now.