I know it is possible to start play_and_detect_speech using multiple builtin grammars like this: builtin:speech/transcribe\nbuiltin:dtmf/digits And I know it is possible to specify an inline grammar like this (for hints): inline:<speech-context>...</speech-context> But would it be possible to use both a builtin grammar and an inline grammar? I tried like this but it didn't work: builtin:dtmf/digits\ninline:<speech-context>...</speech-context> Was anyone able to use something like this?