BM83 MSPK2v1.3 Release Note

Version 1.3 Firmware Updates

The following table details the firmware versions for DSP Image, Host MCU, and specific variants.

Utility Tool Updates

The following table details the utility tool versions.

New Features and Feature Enhancements (Version 1.3)

• A2DP audio mixed with Aux-in/I2S/Microphone inputs. New MMI action (0x80/0x81) commands control the mixer. Config Tool provides an option for this feature.
• Microphone input as Line-in input to Concert master.
• New mechanism in Concert mode for endless grouping to interleave between general access code (for new slave) and dedicated access code (for paired slave). New UART command (0x4B) controls the endless grouping. Config Tool provides an option for this feature.
• Fully supports AVC vendor dependent 0x0B(0x4A) command and 0x1A(0x5D) event for AVC vendor dependent command/response.
• Enhanced UART command 0x08 to provide project target version.
• Improved OTA/UART DFU flash validation performance.
• Enhanced LDAC audio quality by reducing quantization noise floor and harmonic distortion.
• Provided BT CoD setting in configuration tools.
• MCLK can be enabled under I2S slave.
• 32 bytes vendor data can be stored in flash by Config GUI tools. Uart command (0x31 / 0x13) can retrieve/update the stored data.

Bug Fixes (Version 1.3)

• Ringtone volume with external codec in embedded mode.
• Resolved issue where volume could not be increased/decreased from the 2nd Concert Slave device.
• Firmware did not respond to 0x4A uart command after many tries.
• Concert Slave standalone did not trigger auto power off after concert master auto power off.
• No audio output under embedded mode with "power on directly" enabled.
• Paired device list was not updated correctly after the 9th device was paired.
• Embedded battery mode could not auto power off with initial voltage below 3V.
• Missing battery UART event and inability to auto power off in low power mode.
• Concert mode AAC could not be used if A2DP did not support AAC.
• DSP reconfiguration of BCLK for different sampling rates sometimes resulted in I2S left channel audio silence.
• Isupdate v2.97 tool did not upgrade firmware through USB.

Errata (Version 1.3)

• Concert master seldomly cannot link back to iPhone SE (iOS 13.5) once it forms a concert group. This can be recovered by triggering BT reconnection again.

Version 1.2 Firmware Details

This release includes 3 firmware variants located in the following directory structures:

• SPP: IS2083 Turnkey v1.2\Software\IS2083 Image\MSPK2v1.2\SPP
• GFP: IS2083 Turnkey v1.2\Software\IS2083 Image\MSPK2v1.2\GFP
• PBAP: IS2083 Turnkey v1.2\Software\IS2083 Image\MSPK2v1.2\PBAP

Details of these variants are discussed in the BM83 application user guide.

New Features and Feature Enhancements (Version 1.2)

• Bluetooth Spec security vulnerability resolutions: SWEYNTOOTH BLE, BIAS (Bluetooth Impersonation Attacks), and KNOB (Key Negotiation of Bluetooth) BR/EDR vulnerabilities.
• Added New UART commands for Host MCU DFU, AVRCP Vendor Dependent Commands, BTM Version reading, Battery Level Indication, Enable Device Into Test Mode (EDUTM), and GPIO control.
• New Configuration Parameters: AVRCP Browsing Feature, Enable Device Under Test, Auto Role Switch to BT Master, Enable Role Switch in Link Policy, Force As Bluetooth Slave Role, Save MSPK Role When Connected, MSPK Power Saving Grouping Interval, Enable Concert Mode Master SPK Endless Grouping, and Allow Voice Prompt in MSPK Slave.
• Config Tool improvements: Drop down target selection (MSPK/GFP/PBAP/AT) allowing customized configuration parameters and user data manipulation feature.
• DFU process enhancement.
• MBA App: DSP OTA tuning scheme.
• LDAC Codec Enhancement: Passed latest Sony LDAC conformance certification spec, extended media buffer to 32K Byte.
• PBAP: Created PBAP image and added in the release. Resolved PBAP connection issue.
• Google Fast Pair: Created GFP and added in the release. Compatible with existing MBA mobile App feature. Included Google Fast Pair option into application layer general pairing procedure. New Configuration Parameters for Google Fast Pair (Model ID, Private Key, TX Power) and Battery Notification.

Error Resolution (Version 1.2)

• Audio Issues: EQ parameter setting timing error, audio break issues in WCT or general A2DP mode corner cases, WCT volume sync under MCU mode error, disabling MCLK signal at MCLK1 pin.
• Tone/Voice Prompt Issues: Tone play abnormal with line-in enabled during power off, maximum volume causing voice prompt and sine tone disappearance, tone playing abnormal with BLE link existing.
• Bluetooth Connectivity Issues: Revised profiles/ACL disconnection handling, Bluetooth stack and profile defects, SCO link handling incorrect.
• Application Behavior Enhancements: Revised power down flow to avoid AMP pop noise, revised MFB button detection for power on pairing flow, revised report battery level flow, revised audio source switching flow, revised CV mode charging flow, and addressed memory leak in A2DP connection.

Errata (Version 1.2)

• I2S should be configured as I2S Master for both master and slave speakers when BM83 Concert speakers are configured as I2S out. I2S slave is not recommended due to audio discontinuity and unsync between master and slave speakers.
• BM83 attempts to be Bluetooth Slave role during LDAC playback for better performance with certain mobile devices (e.g., Samsung S8) that may not receive ACK properly when BM83 is Master, causing audio breaks.
• Only supports a maximum of 2 A2DP links during A2DP LDAC decode playback due to scatternet topology limitations.
• Coexistence of BLE and SCO link in OTA DSP tuning: It is suggested not to perform tuning and transmit/receive SCO voice simultaneously if the BLE master and SCO receiver are not in the same device to avoid BLE disconnection.
• One-shot audio break occurs when using an Android Phone playing A2DP music and triggering a BLE connection, as the Android phone changes the Bluetooth Low Energy Connection Interval to 7.5 ms, causing lower throughput for A2DP streaming.
• A2DP / Aux-in source switch in A2DP suppress Aux-in case: When A2DP has higher priority than line-in, switching to line-in from A2DP via MBA may cause a delay in line-in music playback due to the phone transmitting silence A2DP music after pausing.
• iPhone does not display battery level icon for Bluetooth accessory if the Class of Device (CoD) of BM83 is 0x240414 (minor device class 0x14 Loudspeaker). The battery level is displayed if CoD is set to 0x240404 (minor device class 0x04 Wearable Headset Device).

Version 1.0 Features

• OTA DFU feature enabled using MBA app (Android & iOS).
• LDAC support enabled.
• MCLK can be enabled/disabled in Config Tool.
• PBAP 1.2 enabled.
• Digital microphone support enabled.
• AAC codec support added for MSPK.
• AVRCP browsing feature enabled.
• DSP OTA tuning enabled.
• Software Development Kit (SDK) enabled.
• Fixed SPKCommandsetTool crashing issue.
• Resolved BLE disconnection issue with Samsung S10E.
• Resolved connection issue after connection is rejected.
• Fixed BLE and Bluetooth classic disconnect when phone call is disconnected.
• SW I2C driver Added.

Document Revision History

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