so quiet, it's spooky...

To be filed under the “why the hell didn’t I think of this sooner?” category of studio management, it recently occurred to me that I might relocate my RAID and other hard drive enclosure to my closet, for the purpose of noise reduction. Of all the negative things I could say about Apple as a company, they have consistently striven for near silet to silent operation on their laptops and desktops. The iMac Pro I bought in April 2018 is no exception. Straight out of the box, there is no appreciable external noise. Maybe if you put your ear up against the chassis you might hear a little something, but background noise in our relatively quiet home is enough to cover it.

When I first bought it, I also purchased this Akitio Hard Drive enclosure with TB3. This allowed me a single device to put several of the internal HDDs and SSDs since the iMac doesn’t allow any expansion. There was some additional noise when the HDDs would be accessed, but for the most part it was pretty quiet and didn’t contribute any significant noise on its own. Fast forward to November of that year, and I was looking for a bigger storage solution. Storage needs for audio has had a slow and predictable curve over the years, but once I got into digital photography and filmmaking, especially at higher resolutions like 4K, the needs jumped exponentially.

I settled on a Promise Technology RAID array with six 4TB drives in a single enclosure. With a RAID 5 configuration I had a solution that offered redundancy as well as some increased speed. Although the redundancy requires some sacrifice of drive space, I still had 20TB of new storage space, which was massive at the time. What I also had, was a noisy new enclosure that required cooling fans to run constantly during operation. This was a stark change from what I had at baseline with the iMac, but I guess I just accepted it since I was happy to get so much new storage space. So much room for activities!

I reconciled myself with the option of shutting the unit off when I wanted to record with microphones. I have used that option a few times, and although a slight inconvenience, it wasn’t that big of a problem. The real issue is that I had this constant background noise in my studio when I would prefer as little noise as possible.

After awhile the noise became distracting enough that I decided to at least move it down behind my desk and shield it with a rectangle of cardboard in service of the bespoke aesthetic for which I’m known. Since it was originally sitting on the desk directly behind my monitor, just positioning it down below the desk made a difference and yes, even the custom cardboard remnant deflected a bit of sound.

I’m not sure it would have been an option back then, but for whatever reason it only occurred to me recently that I might reduce this sound even further by moving the enclosures into the adjacent closet. At present there are some relatively reasonable longer cable options for the higher speed TB cables, but that’s only up to 6.6 feet based on my exhaustive search of about five minutes. I saw longer cables, but they become prohibitively expensive at lengths beyond 6.6 feet. My first idea was the closet in my studio, but the problem is that’s also my vocal booth so I’d be setting myself up for the same issue when wanting to track vocals. I initially just got one longer cable for the RAID, but quickly realized I needed a longer TB-to-DisplayPort cable for my other monitor.

After making the initial change, there was definite improvement, but now I was hearing the Time Machine disk constantly reading from within the Akitio enclosure. I realized the best solution is to move both enclosures not to my vocal closet, but to the thankfully adjacent closet of my drum room. The distance required is essentially the same since the iMac sits in line with where the two closet abut each other on the other side of the wall. The only negative is that the drum room closet is also my amp closet, but I’m rarely recording the amp sound, and when I do it’s probably loud enough that any hard drive noise will be negligible, but if desired, I can always shut down the enclosures temporarily.

All that long-winded explanation (I feel like there’s a theme here) to say that is so, so quiet in my studio now. I really can’t detect those hard drive enclosures now. The only way sound could make it into this space from those drives is through a golf ball diameterish hole where the cables snake through. The noise level isn’t high enough to be heard through the wall, and I have enough cables going through that opening now that sound doesn’t seem to be getting through there either.

Now, when I sit here with nothing playing on the speakers, the only sound I hear is the fish tank running downstairs. At first I thought my ears were playing tricks because the sound of the pump at that distance was relatively similar to the hard drive enclosures, but after a few seconds I realized I was only hearing it over my left shoulder. It’s funny because now that I’ve removed the most offending noise source, I’m hearing the tank and the HVAC. These noise levels are probably not worth fretting over, although I’m likely to shut off the HVAC (temporarily) and I always shut the studio door when I record.

This reminds me of my class on noise and hearing conservation that I took for my Masters of Public Health. The three main approaches to noise control in order of preference are industrial, administrative, and PPE (personal protective equipment.) Industrial controls are typically built-in, permanent type solutions like enclosures built around noisy equipment as well as locating noisy equipment in separate rooms or floors of a building. Relocating the hard drives to another room (closet) is essentially an industrial control. I can also employ an administrative control of shutting off equipment when I need to record. Some might argue that’s a hybrid of both, but in any case I have options.

Why I didn’t think of this in the first place is probably a reflection of the tunnel vision I can sometimes get when enamored of a new piece of kit, in this case the big, new, shiny RAID array with so much more space. It’s a chronic bad habit of mine, but one I strive to overcome when the thought occurs. I often rush in on instinct when a slower and more deliberate planning and execution would serve me better. I endeavor to figure this shit out someday. Don’t wait up.