Hey E. I don't know about mixer external control yet. Have not updated to 5 just yet.

Along with that, there now is mixer recall, so it's getting better.

We shall see.

Mixer recall would be a nicety. Say you want to re-record a vocal. So you call up the song, but when you go to sing you can't hear yourself, so you have to lower all the other instruments. So, boom, I do that all the time and it would be nice to get back to where I was without having to recall an earlier version and cut and paste the re-recorded track onto that.

But external control is the biggie for me.

I checked in with some of my peers and the new Aux Channel will handle your external synth setup with volume and pan. It then works like a normal mix channel with EFX etc.
I don't have an external synth to test on.
Here's some info from the v5 manual:

Aux

An Aux Channel allows an external audio source to be controlled by the Console without the need for an associated track. The incoming audio can be processed by the native plug-in effects, and its volume can be controlled through the sample-accurate automation provided by Studio One. For more information, see Set Up an Aux Channel.

Monitoring an External Instrument

You can use an Aux Channel to monitor the audio output of an external instrument if you don't want to record the audio to your hard drive. This is useful when working with an external MIDI hardware synthesizer, for example, as you can make changes to the MIDI data on an Instrument track without needing to record another take to your hard drive. Audio from the device returns through your audio interface into an Aux Channel in the Console, where it becomes a part of the mix like any other track.

Remember, if your external instrument is also a controller (such as a keyboard workstation), you need to set it up twice. First, set it up as an External Instrument without a Receive From selection, and then set it up as a Keyboard, without a Send To selection. This allows the keyboard-controller section of the workstation to be used as a source for Instrument Tracks, while allowing the synthesizer section to be used as an external instrument.

Bbd wroteI checked in with some of my peers and the new Aux Channel will handle your external synth setup with volume and pan. It then works like a normal mix channel with EFX etc.
I don't have an external synth to test on.
Here's some info from the v5 manual:

Aux

An Aux Channel allows an external audio source to be controlled by the Console without the need for an associated track. The incoming audio can be processed by the native plug-in effects, and its volume can be controlled through the sample-accurate automation provided by Studio One. For more information, see Set Up an Aux Channel.

Monitoring an External Instrument

You can use an Aux Channel to monitor the audio output of an external instrument if you don't want to record the audio to your hard drive. This is useful when working with an external MIDI hardware synthesizer, for example, as you can make changes to the MIDI data on an Instrument track without needing to record another take to your hard drive. Audio from the device returns through your audio interface into an Aux Channel in the Console, where it becomes a part of the mix like any other track.

Remember, if your external instrument is also a controller (such as a keyboard workstation), you need to set it up twice. First, set it up as an External Instrument without a Receive From selection, and then set it up as a Keyboard, without a Send To selection. This allows the keyboard-controller section of the workstation to be used as a source for Instrument Tracks, while allowing the synthesizer section to be used as an external instrument.

Thanks for jumping in.

Um, does an Aux channel look like a normal channel in the mixer, or would I have to go dig somewhere for it? Let me reduce this to the essence:

Up to V5, I record a track from my Korg M3 synth which is set up perfectly as an external instrument and a keyboard controller. I'm not sure if I like the performance, but the track is way louder than the other tracks. I'd like to adjust the volume in the mixer, but that doesn't work. I have to lower the volume on the synth itself. Ditto for panning.

If V5 allows me to easily adjust basics like volume and pan easily in the mixer before having to commit the performance to audio, I buy it. Otherwise, I stay at 2.6 forever and go elsewhere for MIDI. I'm sure Presonus can exist without my upgrade, but I have always liked everything else about the program and it would be swell if it handled this kindergarten MIDI request.

AUX tracks wouldn't send midi volume and pan I wouldn't think. Think of your AUX as just another audio input track

shanabit wroteAUX tracks wouldn't send midi volume and pan I wouldn't think. Think of your AUX as just another audio input track

Ugh. Got excited there for a minute. I know you're a Cubase user also. Guess using two programs for both of their strengths is still the way to fly.

Sounds to me like a midi track that brings in audio instead of getting audio from a VSTi:

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An Aux Channel allows an external audio source to be monitored through the Console without the need for an associated track. The incoming audio can be processed by the native plug-in effects, and its volume can be controlled through the sample-accurate automation provided by Studio One.

An Aux Channel is also useful when working with an external MIDI hardware synthesizer, for example, as you can make changes to the MIDI data on an Instrument track without needing to record another take to your hard drive. Audio from the device returns through your audio interface into an Aux Channel, where it becomes a part of the mix like any other track.

https://www.youtube.com/watch?v=JfdUtczw4rI