BM83 MSPK2v1.2 Release Notes

Version 1.2

The following are the attributes of this firmware version for specific system requirements and device settings. This release includes 3 firmware variants and is located at the following directory structure:

• 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 Enhancement

• Bluetooth Spec security vulnerability resolution
  • SWEYNTOOTH BLE vulnerabilities issues
  • BIAS (Bluetooth Impersonation Attacks) vulnerability issue (CERT/CC VU#647177)
  • Key Negotiation of Bluetooth (KNOB) BR/EDR Vulnerability (CERT VU#918987)
• Added New UART commands
  • Host MCU DFU UART Command Sets
  • AVRCP Vendor Dependent Command Sets
  • New parameter type to Read BTM Version which includes BTM FW version and DSP version details
  • Battery Level Indication to support feature in Report Read Feature List Reply event
  • Enable Device Into Test Mode (EDUTM) command.
  • Re-introduced UART command to control GPIO
• New Configuration Parameters
  • Enable AVRCP Browsing Feature (default Enable)
  • Allow Users to Enable Device Under Test (default Disable)
  • Auto Role Switch to BT Master (default Enable)
  • Enable Role Switch in Link Policy (default Disable)
  • Force As Bluetooth Slave Role (default Disable)
  • Save MSPK Role When Connected (default Disable)
  • MSPK Power Saving Grouping Interval
  • Enable Concert Mode Master SPK Endless Grouping (default Disable)
  • Allow Voice Prompt in MSPK Slave (default Disable)
• Config Tool improvement
  • Drop down target selection (MSPK/GFP/PBAP/AT). Config tool will allow available configuration parameters to be customized.
  • User data manipulation feature provided
• DFU process enhancement
  • MBA App
  • DSP OTA tuning scheme
• LDAC Codec Enhancement
  • Passed with latest Sony LDAC conformance certification spec
  • Extend media buffer to 32K Byte to meet Sony recommendation of Bluetooth high audio quality design
• PBAP
  • Created PBAP image and added in the release
  • Resolved PABP connection issue

Google Fast Pair

• Created GFP and added in the release
• Compatible with existing MBA mobile App feature
• Include Google Fast Pair option into application layer general pairing procedure.
• New Configuration Parameters
  • Google Fast Pair (default Enable)
  • Google Fast Pair Model ID
  • Google Fast Pair Private Key
  • Google Fast Pair TX Power
  • Battery Notification (default Disable)

Error Resolution

• Audio Issue fix
  • EQ parameter setting timing error results in EQ mode ineffective
  • Audio break issues under WCT or/and general A2DP mode corner cases resolved
  • WCT volume sync under MCU mode error.
  • Disabling MCLK, disable signal at MCLK1 pin
• Tone/ Voice Prompt issues fixed
  • Tone play abnormal with line-in enable while powering off
  • Maximum volume causes voice prompt and sine tone disappear
  • Tone playing abnormal with BLE link exists
• Bluetooth connectivity issue fixed
  • Revised profiles/ACL disconnection handling to avoid state machine transition incorrect
  • Bluetooth stack and profile defects result in profiles connection failure
  • SCO link handling incorrect make voice dial and voice transfer abnormal.
• Application behavior enhancement
  • Revise power down flow. Delay PMU power down after power off DSP to avoid AMP pop noise.
  • Revise MFB button detection for power on pairing flow
  • Revise report battery level flow
  • Revise audio source switching flow between A2DP and line-in result in incorrect source reported
  • Revise CV mode charging flow to make charging curve lower down smoothly as expected.
  • Memory leak in A2DP connection

Errata

• I2S configuration: 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 as audio discontinuity and unsync between master and slave speakers are observed when configured as I2S slave. There is no restriction on I2S (Master/Slave) in a single speaker case.
• BM83 Bluetooth role during LDAC playback: BM83 will attempt to be Bluetooth Slave role during LDAC playback. Some mobiles (e.g., Samsung S8) do not receive ACK properly when BM83 is Bluetooth Master role during LDAC playback, causing audio breaks due to lower throughput. To achieve better performance, BM83 will try to be Slave role once LDAC codec is selected.
• Maximum 2 A2DP links during A2DP LDAC decode playback: Due to the above, when a second ACL link is created, it forms a scatternet topology. In this scenario, only 2 A2DP links can be served.
• Coexistence of BLE and SCO link in OTA DSP tuning: While performing "Voice" OTA DSP tuning via BLE, an SCO link is created for transmitting/receiving SCO voice to measure DSP parameter effects. It is suggested that customers do not perform tuning and transmit/receive SCO voice simultaneously if the BLE master and SCO receiver are not on the same device, as BLE disconnection might be observed.
• One-shot audio break occurred while using an Android Phone playing A2DP music and triggering BLE connection: It was observed that Android phones change the Bluetooth Low Energy Connection Interval to 7.5 ms to query the GATT Service Table, causing audio breaks due to lower throughput of A2DP streaming.
• A2DP / Aux-in source switch in A2DP suppress Aux-in case: When configured for A2DP to have higher priority than line-in, switching the audio source to line-in from A2DP via MBA might not play line-in music immediately. This is because most phones transmit silence A2DP music after pausing A2DP. Due to A2DP's higher priority, this silence music is still decoded but inaudible, causing a delay in line-in music playback until the A2DP silence music is terminated. The delay time varies by phone brand, sometimes lasting over 10 seconds.
• iPhone does not display battery level icon for Bluetooth accessory: It was observed that iPhones do not display the battery level if the Class of Device (CoD) of BM83 is 0x240414 (for minor device class 0x14 Loudspeaker). However, iPhones will display the battery level if the CoD of BM83 is set to 0x240404 (for minor device class 0x04 Wearable Headset Device).

Version 1.0

The following are the attributes of this firmware version for specific system requirements and device settings:

• 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 is enabled
• AAC codec support added for MSPK
• AVRCP browsing feature enabled
• DSP OTA tuning enabled
• Software Development Kit (SDK) enabled
• SPKCommandsetTool crashing issue fixed
• BLE disconnection issue with Samsung S10E resolved
• Connection issue after connection is rejected is resolved
• Fixed BLE and Bluetooth classic disconnect when phone call is disconnected
• SW I2C driver Added

Document Revision History

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