On our hardware database only one Travelmate. Here are no problems with sound. But every hardware have his own cards and many times they are diffent in one product version.
OpenSound is the only way to proof.
If OpenSound does not make the change, test di blacklist the board soundcard.
Please help us list hardware tested on Haiku: Hardware List: Complete Systems - Compatibility / Hardware - Haiku Community (haiku-os.org)