# BC127-APTX\_1103708 Module

**URL:** <https://forum.sierrawireless.com/t/bc127-aptx-1103708-module/20932>\
**Category:** WiFi and Bluetooth Modules\
**Created:** [July 15, 2020, 10:49pm UTC](https://forum.sierrawireless.com/t/bc127-aptx-1103708-module/20932 "2020-07-15T22:49:32Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![avergara](https://avatars.discourse-cdn.com/v4/letter/a/bc8723/32.png) [@avergara](https://forum.sierrawireless.com/u/avergara)\
**Post date:** [July 15, 2020, 10:49pm UTC](https://forum.sierrawireless.com/t/bc127-aptx-1103708-module/20932/1 "2020-07-15T22:49:32Z")

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I have a design using the BC127-APTX\_1103708 module. However, that part is at a 12 week lead on Digikey. Is the BC127-HD\_1103709 an appropriate replacement? From a physical footprint /pinout it seems to be.  
What about in firmware?  
If I need to downgrade the firmware to Melody 6.1.5, will I need to load Melody 6.1.5 HD instead?  
I am not using any of the audio functions.

Thank you.

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**Author:** ![Vianney](https://avatars.discourse-cdn.com/v4/letter/v/71e660/32.png) [@Vianney](https://forum.sierrawireless.com/u/Vianney)\
**Post date:** [July 16, 2020, 4:13am UTC](https://forum.sierrawireless.com/t/bc127-aptx-1103708-module/20932/2 "2020-07-16T04:13:56Z")

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Hi @avergara,  
BC127-HD is a good choice. Yes, you need to use Melody HD firmware for upgrading/downgrading BC127 HD. Which is posted at  
[https://source.sierrawireless.com/resources/airprime/software/bc127-firmware/#sthash.BVIs5kBr.dpbs](https://source.sierrawireless.com/resources/airprime/software/bc127-firmware/#sthash.BVIs5kBr.dpbs)  
Please share if you have any concerns you have and help us tick “Solution” if it is helpful to you guy  
Thanks