Firmware that disables "power on", "power off", "bluetooth connected" sounds

Hi,

I really love my EarFun UBOOM L. With Firmware 0.4.8 and Oluv's tuning it is absolutely the perfect speaker to listen to music at a low volume. But it is really frustrating that after listening at a low volume and powering off the device it makes a loud sound. Can you provide a firmware version that disables "power on", "power off" and "blueooth connected" sounds? Maybe for 0.4.8 and 0.5.0? This shouldn't be a big deal and really improve the product.

Regards
Julian