As of now, there is only one known path to get M17 to ASL, and that is to use M172DMR.

nostar MMDVM_CM fork: https://github.com/nostar/MMDVM_CM

Using M172DMR, you can cross-mode M17 to a DMR talkgroup. Then it's a simple matter of getting that DMR TG to ASL.

If anyone's interested in creating an ASL to M17 bridge, feel free to reach out to me.

Steve KC1AWV