Jürgen I'm curious, what is your thought about the volume level of the sound card? Do you think it is loud enough for 1/16 scale operations? I am using a Visaton FRS7-4 which is a 2.5" diameter, 4-ohm speaker. I don't have it in an enclosure, which would probably help. It seems pretty loud to me but I do all my testing on my desk rather than outside in an actual model, so that is not a good test in real conditions. I am going to order the FRS8-4 (3.3" diameter) to see if the larger size makes any difference or not...
It would be better if you used a 4-ohm speaker, you would achieve twice the wattage. However yes, you can also add an external amplifier (connect it to the LINE OUT header). Then you can have as much power as you want but of course it is not an ideal solution.
I have considered designing a new board with a more powerful amplifier. I don't know when I will have time, but if volume will be a limit then it would be better to make a new design now rather than to promote a product that will be disappointing.
Although if anyone has other hardware change suggestions, now is the time to mention it!
I think that what Deny means is that he cannot hear an audible cue that he can fire the cannon again.A solution for him would be to match the sound length and the "loader" shouting "cannon loaded" or something else like "plug your ears" or "Deny you can now push the fire button" etc..
Err, dual channel/amp with seperate sound channel for engine and cannon fire?*edit* is it possible to connect two open sound cards to one TCB?