What you should know before making an entire album on solely a PO-33KO! or PO-133 SF!

Nomad Beats: Pocket Operatin’ it!
I recently ditched my job to start my own company. My new life consists of travelling to many different countries, both in Europe and in Asia very often. Being from Canada, that’s pretty cool.
Travelling can be very rewarding and a beautiful experience, but being away of both my family and studio have been challenging.
While I couldn’t carry my family with me on my trips, I was indeed looking for a portable studio solution.
I ended up using the PO-133, the street fighter version of the PO-33KO, a 8-bit / 23 kHz sampler. In case you’re not technical; that’s Lo-Fi as f*ck…
Simultaneously very capable and limiting, it took me a while to figure out a way to make this little machine sing in a way I could express my artistic voice.
Every single day, I made a beat. Be it on a train, on a plane, in a hotel lobby, in a small coffee shop, name it. Making beats was never so transportable.
Today, I’ll be reviewing what YOU should know in case you intend to do the same.
Travelling the world with a PO-133 was a very rewarding experience
Preparation is the key
I am a very spontaneous type of guy, but once in a while I like to build tools and system for myself. This was no exception.
Contacting Teenage Engineering
The first step for me was to truly understand what was happening under the hood, so I could get the max out of that little machine. I ask questions about why their 8-bit device sounded much better than a 8-bit crush in a DAW, what was the sampling rate, if there was a difference between the sound engine bitrate and the sample bitrate, since you need extra bits for “mixing”. Here are the answers I got from them:
Q1:
The samples are stored as 8-bit. However, unlike a normal bitcrusher they are stored in u-law format which means that the resolution isn’t linear; the resolution is higher for the quiet parts of the recording. This will make a noise gate less efficient than it is for linear, PCM 8-bit recordings. For dithering to be useful, it would probably have to be a u-law-specific dithering. Though you can of course try it out—both noise gate and dithering might prove to be useful in some ways! There is no dithering or noise gate applied to the sampling in the po-33 (though the factory samples are actually processed with a u-law-weighted dithering).
Q2:
The playback and recording sample rate in the po-33 is 46875 Hz due to some hardware limitations. This gets downsampled to half that rate when stored to memory. So you could try to filter out stuff above about 12kHz to avoid alias distortion.
There is an anti-alias filter applied to the recordings before downsampling, but due to limited memory and CPU of the PO, it’s rather crude. The factory content was converted with an offline tool with proper anti-aliased resampling.
Q3:
Some of this was answered above. All internal processing (track volume/filters/FX/mixing/output) is done in 16-bit ~47kHz.
Summary of their answer:
The sound engine runs at 16-bit 47 kHz, when recording (it also first record at that rate), then apply a top end filter, prior to downsample and truncate to store it at 8-bit 23 kHz.
Since resolution is not linear in the bitrate, it gives more precision towards the lower levels, which is why the 8-bit of the unit sounds much better than a 8-bit from a bitcrusher in a DAW. From my test, you get a dynamic range closer to a 11-bit linear PCM. That said, 8-bit gives only only 256 values possible(!), that’s really not a lot to represent complex signal.
This reinforce the idea that you truly need to record the signal hot to maximize the chance that the information reaches the mu-law, if we assume the dynamic range of a 11-bit recording, you get approx. 68 db to work with. Consider anything below to be lost.
If you are in a studio, I suggest you apply a drastic high-cut (low-pass) filter at around 11-12 kHz.
Preparing a great sample pack
You have 40 secs of sampling only. In my case, I’ve decided that I wanted to carry me at all time the following:
Rhythmic section:
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8 kicks
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8 snares
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8 hihats
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8 percussion
These are spread on pads 9 and 10. To get a nice top in hihats and cymbals, for example, I slowed it down prior to record, since you can always pitch it up after, and it will sound nice since the PO can playback up 22 kHz (half of the 47 kHz sampling rate). For kicks, I usually did the opposite, accelerate it to sample it fast, so I can use less sampling time.
Then I record single bass notes in the melodic section on pads 5, 6 and 7.
This entire config takes about 17 sec, so it leaves us 23 secs left for sampling various material on the go. I did the entire album using that setup.
As you might know, you can save and load “sessions” onto the PO. So I made my own template, and loaded it onto the 3 POs I own (2x PO-133SF, and 1x PO-33KO!).
Feel free to contact me, I can share the saved file with you.
Below is the entire album made with that template:
Mastery
My last point is about learning how that machine works. It is indeed a very capable sampler. It has pretty cool effects that you either play live, or record onto a pattern. You can copy pattern and make variants, to build an entire song. you can even change the pitch on the fly, etc.
That said, you need to study it. Plenty of cool videos on YouTube exists on the topic. Here is a list of what tools I believe you will need in your arsenal:
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How to Chop samples. In summary you record into melodic first, and then you copy into the rhythmic pads, it will chop the sample into 16 equal-length samples. From there, you can fine tune.
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Record your signal hot just before clipping.
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To save some voices, You can put the hihat on beat 2 and 4 instead of 1 and 2, use Swing to bring it back on beat.
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Learn how to use the FX and Record them, they can be used as variants for your song. Some of them are very powerful.
Just make beats, over and over, and once you get good with the PO, compile your favorites, record them into a DAW, master to taste, and release it to the world!
Share it with the world
Finally, once you finish your album, feel free to pitch your project to me, and I’ll include whatever I like into the following playlist:





















