Mac ardour6-lua Audio/MIDI Engine

[pdubs]

Hi,

I’ve just downloaded Ardour today for Mac, am trying to use the lua interface and experience the following error

$ ./ardour6-lua

s = load_session ("/Users/ardour/Can-Can-1/",“Can-Can-1”)
Cannot create Audio/MIDI engine

The session “Can-Can-1” exists already, can play through the speakers and uses “CoreAudio” as the audio backend. Note that

AudioEngine:set_backend(“CoreAudio”,"","")

Doesn’t seem to help.

I did get this same procedure working in Linux, so I think I know basically what I’m doing. But if anybody can help that would be great.

Running Mac 10.14.6 / Ardour 6.5.0 (demo version)

Thanks!!
-Patrick

[pdubs]

Solved. There’s a typo in the script. I fixed one but not all of them. The path definitions are wrong. (I still think some of them are bad; there’s no /share or /etc in the mac release). Anyway, for anyone else concerned, I’ll paste it below. And if the devs are reading, please raise this issue on git

vi ardour6-lua
#!/bin/sh
BIN_DIR=$(dirname “$0”)
BUNDLE_DIR=$(dirname “$BIN_DIR”)

export ARDOUR_DATA_PATH="$BUNDLE_DIR/…/share"
export ARDOUR_CONFIG_PATH="$BUNDLE_DIR/…/etc"
export ARDOUR_DLL_PATH="$BUNDLE_DIR/…/lib"
export VAMP_PATH="$BUNDLE_DIR/…/lib"${VAMP_PATH:+:$VAMP_PATH}

SELF=$(basename “$0”)
echo $BUNDLE_DIR
exec “$BUNDLE_DIR/…/lib/$SELF” “$@”

[x42 (Robin Gareus)]

@pdubs

AudioEngine:set_backend(“CoreAudio”,"","")

That’s only the first step.

I’m away from the mac, but you do need to specify settings for the device (except for the sample-rate which is taken from the session). On GNU/Linux it would be as follows:

backend = AudioEngine:set_backend("ALSA", "", "")
backend:set_buffer_size(256)
backend:set_peridod_size(3)
backend:set_device_name("AudioBox 1818 VSL")

To list devices, you can use:

for i,_ in backend:enumerate_devices():iter() do print (i.name) end

see https://manual.ardour.org/lua-scripting/#Commandline%20Session

[pdubs]

Thanks for the quick response! Between my edits and your help it’s working now