Where do I set recording level in Logic?

No need to apologise at all. But this is exactly what Erik said in the very first reply although he didn't know what interface you had.

It took me about 3 minutes to find the manual and go to the right section. With Erik's (and Pancenter's) reply and the actual hardware (and I presume the manual) in front of you, you should have been able to piece the answer together. There are lots of people here who will help you but you have to start making these logical connections and lookups otherwise you are going to get very frustrated and make extemely slow progress in the wonderful world of audio.

I only say this as you seem like a decent person and you're always eager to try and help. You really need, though, to work on your logical problem solving skills but at the same time I don't want you to stop asking for help. That would defeat the object of the forum. There is a decent sized middle ground.

Information is not knowledge

Knowledge is not experience

You have excellent hardware, it's a responsibility to read the manuals and learn the hardware inside and out.

A couple of minutes with the manual could've cleared this all up.

Looks like Octopi found the manual and beat me to the reply button. 😉

kerochan,

Eriksimon of course is correct, there's no hoping about it. He's an expert! As an engineer, I figured I'd just add the description of the chain though in hopes of helping you better understand.

Your mic produces a very low amplitude electrical signal. Your pre-amp then takes that very low signal and amplifies it enough for your ADC (Analog to Digital Converter) to have something it can work with and give you an adequate signal range (dynamic range). Then you have an interface that takes that digital representation of your audio and puts it on an electrical interface and packages it up in the correct protocols for your computer to understand (USB, Firewire, Thunderbolt, etc.). The DAW (Logic Pro X) then reads and stores that signal and allows you to do all the audio processing you need to make great sounding stuff.

Now, with all that in mind, your Apollo is almost certainly a pre-amp and interface in one. These can be bought separately though it's not that common these days. I have a hunch your Apollo also has a DSP in it that allows you to have plugins on it to do processing after the ADC but before the interface. I don't know if everything Apollo makes does but it's kind of their thing.

So, to adjust the "level" you are adjusting the gain of the pre-amp. (Sometimes this is done digitally too.) Sometimes your DAW, or other software that Apollo may provide, will allow you to adjust the gain, and sometimes it's just a knob or buttons on your pre-amp. Either way you are adjusting the gain of the pre-amp.

Good luck!

Logic's channel meters perform Input gain "Monitoring" when record enabled.

Your input level is controlled by your audio Interface controls, you can monitor the level in Logic.

Check out the pic below, I have a guitar cable plugged into my interface, and I'm holding my thumb on the tip while not touching ground, the hum level is at -6.1db. That is your input level, I set it by adjusting the gain on my interface.

My Settings in Logic's Preferences/Audio under the General Tab, Software Monitoring is unchecked as are the two settings below software monitoring. (I monitor through a hardware mixer)

I couldn't find the manual online, though I'd hope they sent you one or gave you a link for it. That being said, I pulled a picture of that one and here is what I see.

You have an input button that lets you select the input the preamp knob is adjusting and it'll illuminate the number of that channel (or maybe just brighter). Select your input and then adjust the preamp knob while monitoring whatever it is that is on that channel. In your case you'll need to play something on the guitar while adjusting the gain. The big 8 channel meter in the middle is the meter everyone is telling you about. It appears from the pic that the top segment will likely be red which would be 0dBFS or maybe just above (aka clipping), the manual will tell you. If you never got it, lost it, or it's TL;DR then you're probably safe to set it with your levels mostly in the top of green to first yellow. Hopefully a musician will give better advice there though.

That preamp knob just adjusts the level of the selected channel and the meter will give you your levels. Use the meter and set the level for that channel appropriately. The 0 to 10 is just a reference and while it probably corresponds to preamp gain in some fashion just use it to set your levels on the meter. It probably doesn't matter to you what dB gain it is set for as long as your gain staging is correct based on the channel you're setting on that 8 channel meter.