- Ardour will only ever deal with a single audio device. When it is - desired to use more than one audio device at the same time, there are two - choices: -
- -- Ardour is fundamentally designed to be a component in a pro-audio/music - creation environment. Standard operating practice for such setups involves - using only a single digital sample clock (something counting off - the time between audio samples). This means that trying to use multiple - independent soundcards is problematic, because each soundcard has its own - sample clock, running independently from the others. Over time, these - different clocks drift out of sync with each other, which causes - glitches in the audio. This drift cannot be stopped, although in some cases - the effects may be insignificant enough that they might not be noticeable. -
- -- Thus, in an ideal world, a single device with a single clock and all the inputs, - outputs and other features needed should be used. Of course, there are those - who like to point out that this is not an ideal world, and believe that software - should make up for this. -
- -- In CoreAudio, aggregate devices provide a method to use multiple - soundcards as a single device. For example, two eight-channel devices can be - aggregated so that 16 channels can be recorded in Ardour. -
- -- Another example is using Soundflower to route audio to Ardour. To output the - audio through the speakers you will have to create an aggregate device to specify - Soundflower as the input and Built-in-Output as the output. In the Audio/MIDI Setup - in Ardour specify the aggregate device as both the Input and Output devices. And then - on the master track ensure you have specified the correct output channels. For example, - if you are using Soundflower(64) as input, Channels 65/66 will be the output - channels on your master track. -
- -- When using a single typical 3rd party audio interface (such as those - from Apogee, RME, Presonus, and many others), or using JackPilot or - a similar application to start JACK, there is no need to worry about any of - this. An aggregate device only needs to be set up if any of the following - conditions are true: - -
- In the case of a builtin audio device, an aggregate device that combines - "Builtin Input" and "Builtin Output" into one device needs to be created. -
- -- The precise instructions for creating an aggregate device on OS X have varied - from one released to another. Please read https://support.apple.com/en-us/HT202000. -
- -- Please see the instructions at http://jackaudio.org/faq. -
- diff --git a/master-doc.txt b/master-doc.txt index 478f7f75..cba4e7f4 100644 --- a/master-doc.txt +++ b/master-doc.txt @@ -216,15 +216,6 @@ uri: setting-up-your-system/connecting-audio-and-midi-devices part: subchapter --- ---- -title: Using More Than One Audio Device -menu_title: More Than One Audio Device -include: using-more-than-one-audio-device.html -link: using-more-than-one-audio-device -uri: setting-up-your-system/using_more_than_one_audio_device -part: subchapter ---- - --- title: Monitor Setup in Ardour menu_title: Monitor Setup in Ardour