Real-Time Analog Summing From Your DAW

Key Takeaways

• Analog Source is a free companion plugin, installed as part of Analog Matrix, that you place on each stem; Analog Matrix goes on one aux or the master and receives them all.
• Each Analog Source streams its stem to the Analog Matrix over a direct local connection, outside your DAW's mixer, so the stems arrive individually and sum per-channel in the hardware, not as a pre-summed mix.
• Up to 16 channels: eight stereo stems, sixteen mono, or any mix of the two.
• All the D/A and A/D conversion a summing rig needs (sixteen channels in, a stereo pair back) is already wired to the hardware and included with Access Analog.
• In Logic especially, also bus your mix into the Analog Matrix's channel. Some DAWs stop processing a plugin they think has no input, and this keeps it running (and gives you the monitor return).
• The summing mixer must be the first device in the chain. If it isn't, only the first channel passes, which is the usual cause of "I only hear one source."
• Set your balance with the per-source gains in the Source panel and/or on the hardware, then arm, play, and upload to capture the sum to bounce-ready files.

What's New: Live Multi-Channel Summing

A summing mixer needs sixteen inputs. A real-time internet stream, historically, carried a stereo pair, which is why summing at Access Analog used to be an offline job. Analog Matrix 8.3 lifts that limit: it streams up to sixteen DAW channels to the rack at once, so the 5059's sixteen inputs each get their own live feed from your session.

The result is the workflow a hardware summing setup gives you, with none of the patching: sixteen faders of balance, real transformers on the output, and the sound updating the instant you move something, all from inside the DAW you're already mixing in.

There's a quieter part of this worth saying out loud. Sixteen live channels means sixteen channels of digital-to-analog conversion feeding the mixer and a stereo analog-to-digital pair bringing the sum back. In a home rig that converter count is the expensive half of analog summing, and it's the reason each summing mixer in our racks ties up a large share of the conversion we have. At Access Analog every one of those converter channels is already wired to the hardware and included with the service. You bring the stems.

Real-time summing means you mix into the hardware, not toward it.

The Two Plugins: Analog Source and Analog Matrix

Analog Source is a lightweight utility that goes on each stem you want summed. Its only job is to send that track's audio to the Analog Matrix.

• Name. This is how the stem appears in the Analog Matrix. It follows your DAW track name automatically: a track called Guitars shows up as Guitars, and renaming the track updates it. Type your own if you prefer; Use Track Name snaps it back whenever you want.
• Show as mono source in matrix. Sends only the left channel as a single mono source. Useful for DAWs that copy mono content across both sides of a stereo track.
• The status line confirms it's talking to the Analog Matrix.

Analog Matrix goes on one channel, an aux/bus or the master, and acts as the hub. It receives every stem, lays them across the summing mixer's inputs, and returns the summed stereo signal.

One plugin per stem, one Matrix to catch them all.

How Do Your Stems Reach the Hardware?

Here's the part that makes it work: each Analog Source sends its stem to the Analog Matrix over a direct connection on your computer, not through your DAW's mixer. The stems travel side-by-side, already separated, and land on their own channels at the Matrix, which routes them straight to the summing mixer's individual inputs.

That's the whole trick behind per-channel summing. Twelve mono channels of six stereo stems arrive as twelve discrete feeds, exactly as if you'd run twelve cables into the back of the 5059, not as one stereo mix your DAW already added together.

Your DAW does the playing; the summing happens channel-by-channel in the box.

Why Route Your Mix Into the Matrix Too?

If the stems reach the Matrix on their own, do you also need to route audio to it inside the DAW? Two answers:

• For the summing itself: no. The stems arrive over that direct connection no matter how your DAW busing is set.
• For reliable operation: usually yes, and it's an easy habit. Some DAWs (Logic is the one to watch) will stop calling a plugin entirely if they decide nothing is routed to its track, a CPU-saving optimization. If that happens to the Analog Matrix, it goes idle. Sending your mix into the Matrix's channel keeps the DAW processing it, and it doubles as your monitoring path for the analog return.

So the setup we recommend is simple: an Analog Source on every stem, and your mix bussed into the Analog Matrix's aux.

Route the mix in, and the DAW keeps the Matrix awake.

Setting It Up in Logic

Insert an Analog Source on each stem, make an aux for the Analog Matrix, and send the stems to it.

Here the stems feed two auxes: analog sum, which hosts the Analog Matrix, and digital sum. The digital aux exists only to A/B the in-the-box mix against the analog return. It's not required. For summing alone, one aux with the Analog Matrix is all you need.

In the mixer detail you can see the recipe: an Analog Source in the first insert of every stem, Bus 1 and Bus 2 sends on each, and the Analog Matrix sitting in the insert of the analog sum aux. The dotted arrows show the part Logic doesn't draw for you: each Analog Source hands its stem straight to the Analog Matrix over a direct local connection, outside the bus sends.

Setting It Up in Reaper

Same idea, one destination. Each stem carries an Analog Source and routes to a single track running the Analog Matrix.

Different DAW, identical recipe: sources on the stems, Matrix on the bus.

Routing Your Sources in the Analog Matrix

Open the Analog Matrix and go to the Source tab. Your connected stems appear under Tracks on the left (next to DAW, which is the mix you bussed in). Drag each source onto the channels you want it summed on. Here six stereo stems fill channels 1–12 as L/R pairs.

Every routed channel gets a mute / solo / gain strip, so you can balance the sum right here. The gain readout is click-to-type when you want an exact number.

Drag a source to a channel, and it's on that input of the summing mixer.

Insert the Summing Mixer First

Routing sources to channels doesn't sum them on its own. Those channels only combine once a summing device leads the equipment chain. On the Equipment tab, add your summing mixer as the first device.

The 5059 Satellite is a 16 × 2+2 summing mixer, so all twelve routed channels land on its inputs. You can see them labeled Drums, Bass, Guitars, Keys, BVox, and LVox, with level, pan, Silk, and Texture ready to go.

A summing mixer only sums when it's first in line.

Balancing the Sum

You have two sets of hands on the balance, and you can use either or both:

• Per-source gain in the Source tab: mute, solo, and level per channel.
• The hardware's own controls: the 5059's sixteen channel levels and pans.

If your summing unit has no input gain of its own, the Source-tab gains become your primary balance control. Set the mix there. That's exactly the case with the Rupert Neve Designs 5057 Orbit, a 16-channel summing mixer with Silk and Texture but no per-channel level or pan, which is joining the Access Analog rack soon.

Balance in the panel, on the hardware, or both, whatever your unit gives you.

From a Live Sum to Finished Files

Once the real-time sum sounds right, printing it is a short, hands-off sequence on the Source tab:

1. Turn on Auto-load when upload completes so the captured files return to the session ready to use.
2. Arm all your sources.
3. Play the section you want to print. Each source uploads as it plays.
4. When the upload finishes, the files auto-load on the server, already in place.
5. Do one server playback to confirm everything lines up (keep Sync server file playback to DAW on so it follows your playhead).
6. Choose your Bounce settings and print the final file.

Because the print happens from the files on the server, a hiccup on your connection can't ruin it, and there's no limit on how long the section runs.

Mix it live, then capture it clean.

Bonus: Audition One Processor Across Several Tracks

Here's a second trick the Analog Source unlocks, and it has nothing to do with summing. Suppose you want to hear the same piece of hardware, one compressor, one EQ, on your vocal, then the snare, then the bass, to compare how it treats each. Normally that means dragging the Analog Matrix from track to track, or running several instances and pulling the gear out of one to load it into the next: slow, and you lose the moment you were chasing.

Instead, set it up like a mini summing rig. Put an Analog Source on each candidate track, put one Analog Matrix on an aux with your processor loaded, and route to channels 1/2. Now, with the song playing, drag a different source onto channels 1/2 whenever you like. The input feeding the hardware switches in real time. Vocal, snare, bass, back to the vocal, all through the same physical unit, no reloading and no re-patching.

One unit, every track, instant compares, while the music plays.

Conclusion

Real-time summing closes the gap between mixing in the box and finishing on a console's output stage. Drop an Analog Source on each stem, an Analog Matrix on an aux, put a summing mixer first in the chain, and your session plays straight through sixteen channels of real analog hardware: balanced with your mouse, colored with Silk and Texture, and captured to a bounce whenever you're ready. The last stage of the console, live in your DAW.

Analog Matrix 8.3 is in public beta now on the Downloads page, and the 5059 Satellite lives in the Elite tier of the Access Analog Subscription.

Sixteen channels, one summing mixer, zero exports. Press play.