I think you will get more atention of people with reqired knowledge in "Development" section of this forum

You can also google something like "bluez disable profiles". Software onour N900 responsible for bluetooth is called BlueZ. It's in fact old version of bluetooth stack used on desktop Linux computers. Here are some links I found about a2dp profile in Bluez:

- http://askubuntu.com/questions/2573/...-a2dp-receiver
- http://blog.cyphermox.net/2012/03/ca...nd-hsphfp.html

However, it may require programming skills and at least semi-advanced Linux knowledge to achieve this. If you get any further, please report here

edit: you may also have a look at files in /etc/bluetooth directory. in /etc/bluetooth/audio.conf there is line saying: , if you're not afraid of experimenting you may try to set it to false to disable HFP. But I don't have any idea how to disable HSP unfortunately. You could add "audio" to "DisablePlugins" line in /etc/bluetooth/main.conf, but it may disable also a2dp/avrcp...