Studio One's automation model might not seem very straightforward, but it can be extremely flexible...
One of the most important features in any DAW is the ability to automate. In most DAWs, Studio One included, nearly every aspect of the program can be automated: channel volume, pan, mute, plug-in parameters, and virtual instrument (VI) parameters. However, the model used for automation varies from DAW to DAW, depending on how it is structured.
Pretty much every DAW I've encountered allows generation and editing of automation data using the breakpoint curve (sometimes called 'rubber band') model, in which automation points are created along the timeline on tracks. In Studio One, breakpoint automation curves are called 'envelopes'. However, track structure varies a bit between DAWs, creating some differences in where automation data resides.
Studio One's track structure does not incorporate a one-to-one relationship between tracks in its Arrange view and channels in its Mix view. This leads to an automation model that is perhaps not as completely obvious as in situations where a direct, one-to-one correlation does exist, but one that is nevertheless pretty easy to grasp and quite flexible. To keep things clear as we go along, I'll review the types of tracks and channels in Studio One, and describe how automation fits into the picture.
Studio One has four types of tracks: Audio, Instrument, Folder, and Automation. Automation tracks must be where automation resides, right? Well, it certainly can live there, but automation can reside on any of the four track types. So what difference does track type make? Let's take a look at the types one at a time.
Audio tracks are the most straightforward, especially because they are the only track type for which a one-to-one correspondence between tracks and mixer channels exists; every Audio track has one, and only one, Audio channel in the mixer. Thus, an Audio track can contain automation for everything pertaining to that channel, and only parameters pertaining to that channel. Let's take a look at how it works:
Now let's turn to how automation operates on Instrument tracks:
In this example, I am using the PreSonus Presence instrument that comes bundled with Studio One. The folders in the right-hand pane contain all automatable parameters for the instrument. Two folders are different to the rest: the Audio folder, which contains Volume, Pan, and Mute mixer parameters for the Instrument channel through which the instrument's audio is being returned; and the MIDI Controller folder, which enables automation using standard MIDI continuous controllers. These might be recorded in real time from a keyboard or other controller.
If you drop an effect on the track, the effect will be instantiated on the return channel, and its parameters will show up in an Inserts folder inside the Audio folder.
Instrument track automation is a little different to Audio track automation, in that it focuses more on automating Instrument parameters, and it also includes automation for the corresponding Instrument channel. But what if the instrument uses more than one channel, as is common with drum instruments? It turns out that all automation, instrument and audio parameter envelopes, for all channels, can be hosted on a single Instrument track. Let's move on to Folder tracks…
No default parameters appear in the Automation Parameter drop-down of a Folder track, but open the Automation Add/Remove dialogue for the track and there are folders for every darned thing in the entire Song. Oddly, though, if click on most of the folders nothing drops down. So what gives?
Basically, the envelopes available for automation on a Folder track are the envelopes that have not already been used elsewhere. Since volume, pan, and mute for every Audio channel exists on the corresponding tracks by default, you won't find them here, but if there are insert effects on those channels that have not yet been automated, parameters for those effects are available on the Folder track.
This brings us to a key aspect of the track/channel dichotomy, before which we will take a quick detour to talk about channel types. In Studio One, there are Input, Output, Audio, Instrument, Bus and Effects channels. As we have established, Audio and Instrument channels correspond to tracks in some fashion, providing clear locations for automating them, but there are no tracks corresponding to Input, Output, Bus and Effects channels. Automation for any of these channel types can only be performed on Folder or Automation tracks.
You won't often automate Input channels. The only thing you can automate on Input channels is insert effects, which are printed as the input signal is recorded. While you may sometimes choose to record with effects, and you might conceivably choose to automate those effects as you record, it is not something you are likely to do regularly. You may have a few more reasons to automate Output channels, and you'll have plenty of applications for automating Bus and Effects channels.
In fact, Folder tracks and Automation tracks are the same in their automation capabilities, so Input, Output, Bus, and Effects channels can be automated on either kind of track. From an automation standpoint, the only difference between Folder and Automation tracks is how you prefer to organise your automation envelopes.
While the most obvious benefit of a Folder track is that it hides and shows all of the tracks it contains, there is another important feature, which is the ability to assign a Folder track to a Bus channel. All tracks contained in the Folder track then use this channel as a submix. So all my drum tracks are packed in a 'drums' Folder track, which is then routed to a 'drum sub' Bus channel to create my drum submix. Having done that, I create all automation for the submix channel on the Folder track, which proves a tidy, intuitive method of keeping submix automation close to all of the drum track automation.
What use does that leave for Automation tracks? You might use an Automation track to automate one or more Effects channels, or a Bus channel that is not acting as a submix. Automation tracks are the most logical choice for those crazy Input and Output channel automation applications, too. In practice, I rarely have need for Automation tracks.
That leaves only one more automation component to talk about. Part automation, like Instrument track automation, enables automating of instruments. But Part automation differs from Instrument track automation in a few important ways. First, Part automation is created in lanes that appear below the note display in the Music (piano-roll) Editor, rather than in an Arrange view track. Second, only parameters of the instrument itself can be automated with Part automation, not parameters of the instrument channels in the mixer. Third, and very importantly, Part automation is local to the Part; that is, when you move the Part, the automation travels with it.
There are a few details about Studio One's automation scheme that you need to keep straight, but in practice I end up automating Audio channels on the corresponding Audio tracks, instruments and their channels in the mixer on Instrument tracks, and submixes on corresponding Folder tracks, which is hardly complicated. You have to draw the line somewhere on complexity!