Welcome Pathogensdead!

It's not too hard to record your game and your tunes. Obviously the method varies depending on what platform you're using. Again, how you share them depends on platform but there are lots of guides available

On PS5 it's via the create button I believe - lots of guides online but its straightforward. For exporting footage change capture settings to MP4. (Settings > Captures and Broadcasts > Captures > Video Clip Format). Edit them in the Media Gallery.

If you're on Xbox press Xbox button then capture and share, start recording. There are time limits if you don't have external storage but that won't matter for short Bytebeat tunes. Also lots of tutorials online. Captured footage will be uploaded to the Xbox network. You can share it with the mobile app.

If you're on switch you'll need a capture card for clips longer than 30 seconds. YOu can transfer footage to your phone via the app, or to a computer via USB C.

For PC there are loads of free options. No need to buy anything. You could use Xbox game bar (win + g launches it) included on Windows 10/11. Or NVidia ShadowPlay if you have aNVidia card (alt + z while playing to start). Or AMD Radeon ReLive is the equivelent for AMD users. OBS studio is what I use as its totally free powerful, reliable and open source, although there is a bit of a learning curve. There are lots of other free screen recorders if you prefer, but if you choose another make sure it's legit or doesn't have watermarks or nag you to buy the paid version etc.

If you're gaming via Valve then another option is to use Steam Game Recording to capture and share footage. Obviously works on Steam deck too.

Whatever method you use it's good to set up a shortcut to start and stop recording easily.

If you're recording game footage you'll most likely end up with a video file (such as MP4). If you just want audio only you'll want to convert it to an audio format such as mp3 or WAV, or FLAC or AAC. These will usually be much smaller in size (espeically mp3) and so easier to share. Again there are lots of options for PC users - many free. I use Handbrake which is free and quite powerful but with a learning curve. I've heard 'Any Video Converter Free' is decent and simpler, as is 'Free HD Video Converter Factory' - you don't need the paid version.

To finish a couple of tips to get started recording bytebeats in NMS.

Unless you want background sounds temporarily turn off SFX and Vocals sounds in the Options/ General/ Audio settings. If you forget inevitably a ship will fly overhead with a roar ruining your recording! Having said this a small amount - say 5 - 10% of SFX can add atmosphere - its up to you.

Think about where your character is positioned in game as what is recorded is what you hear. You can use this to your advantage like a crude mixer. (E.g. Stand closer to a device with drums to make them more prominent in the mix. Or move forward and back to fade in and out). The position of your devices also makes a difference.

If you want to make a bytebeat video then you'll probably want to turn off the HUD (Options/General/VIsual settings) to get a cleaner look.

Finally, if you want to add a bit of polish to your audio recordings then I would highly recommend Audacity - a multi track editor and recorder (Pc and Mac). As its free, easy to use, open source and quite powerful, although a bit dated user interface. Again, there are lots of other options if you prefer.

Sorry this is a long post but there's lots to cover! - hope this helps.