Overall, the sound pack is quite nice and I like to play with it. It's not quite on par with the quality of OpenSFX, but it's still good enough for me to keep it for now.
Thanks a lot for your contributions! Especially for making sure it's 100% libre! I really hope the default sounds for OpenTTD could be one day truly libre.
However, there are a lot of “little” things in the sound pack that bother me, and the little things just add up. This sound pack still needs some work before I feel comfortable to recommend it for “official” use.
I will list all complaints here:
In some of the vehicle sounds, you hear the vehicle going from left to right speaker. I find this extremely irritating. It should not sound like the vehicle is moving with the speakers, it should be uniform. If you hear a vehicle sound, it could be anywhere on the screen, so it's really odd to have the vehicle move from the left to right speaker. The sound should should be uniform on both channels.
The road vehicle horns don't sound natural, the horn just comes out of “nothing”, long after the engine sound. It's also very loud and very high pitched, it hurts my ears!
The concorde / high speed plane sounds are waaaay too long. It's not well in sync with the actual plane take off on the screen. The plane has a very fast take off.
The plane sounds in general take too long, much longer tan the take-off speed. IMO the plane sounds should all be tested if they are in sync with the plane take-off on-screen (assuming default speed for all planes, of course). And they all should be shorter in general.
The ship horns are VERY loud and aggressive.
The train sounds are mostly OK IMO.
The maglev sound works nice, too.
The monorail sound is too long and too subtle. This one stands out; it doesn't go well together with the other train sounds.
The toffe mine sound sounds a bit “dark” and is not comical. It doesn't fit the overall Toyland theme.
I think the toy factory sounds are nice. I like how you added a rubber ducky sound, it fits nice with OpenGFX. Note in the original TTD graphics, IIRC the toy factory produces robots, not rubber duckies, but that's OK.
The suger mine is a bit too dull IMO.
The bubble generator sounds are perfect. Nothing else to say here.
The railroad crossing sound is too long. 7 beeps for a SINGLE crossing are too much. Maybe 3 beeps are enough (not sure). This really stacks up at busy crossings. Also, could use a fade-out effect, IMO, the end of the sound feels too “sharp”.
The new year sound (00.wav) is inappropriate IMO. This sound is only supposed to play when the year
report pops up. Its an interface thing. If the player disabled the report, the sound does not play. So this sound should be an interface sound.
38.wav sounds like a drunken horse and it just sounds very, very silly. I would replace this one.
The sound for the (temperate) sawmill and the paper mill are wrong. You hear a chainsaw. But a chainsaw makes more sense in the forest. For temperate sawmill/papermill, a circular saw makes much more sense.
In altsfx.sfo, you use an odd licence name “CC3 ATTRIBUTION”. The correct name is “Creative Commons Attribution 3.0”, or short “CC BY 3.0”.
For some reason, the version number is not shown in the game settings menu. Compare this with OpenSFX, OpenMSX and OpenGFX, which all include a version number at the end. The readme should also mention a version number.