Dialing In The Guitar Sound for "Clean" (Non Distorted) rhythm playing for Pop, Rock, Country and any other similar styles.
Most of the information in this article series is based upon a separate mixer and recorder. Yes, in this era, computer hard disk recorders have built in mixers and are becoming the norm. Throughout the series I'll make sure to note how to work with computer hard disk recorders/mixers, but I'll default toward separate components. There are still many users that have separate mixers and recorders so as to be fair to all readers, it is easier to adapt to using a separate mixer and recorder than it is to adapt using a computer hard disk recorder. Just the same, it should be easy enough for computer/hard disk recorder owners to adapt the information. Ok, let's get to work.
Now that we have the best mic position set and the mic stand and cable is anchored down (read previous part) and the amp baffled if needed, before we EQ the guitar signal, you may ask the guitarist to change amp tone control settings. Of course, if you are the guitarist, a one-man show, that allows total control. For example, you may think the sound needs slightly more treble, presence, mid-range, or bass. Depending upon the amp tone control options, this is the time to experiment. After achieving the best possible settings from the amp, it's almost time to add EQ on the recording mixer.
To make things easy I always refer to the mixer/recorder set up. Yes, you will need to refer to other details in previous articles from this series, so please do so after the mixer recorder set up. For our example, we are recording the guitar on track #7 and using mixer module #9 for the guitar mic input. If you're using a digital recorder with a built in mixer, simply adapt with the same layout.
- Plug the guitar mic cable into mixer module #9 mic input.
- On module #9, set the mic pre-amp trim to -20 dB. (If you have only one input gain trim pot, that is used for either a line-input gain or mic input. If you're using a computer hard disk recorder with outboard analog to digital inputs, use the same setting on the input level control to start.)
- Assign mixer module #9 to buss #7 (buss #7 routes to the recorder track we are using for the guitar). Make sure that module #9 is not sent through the monitor chain and is only routed to record track #7.
- Set recorder track #7 into "input mode" so we can monitor through the recorder. (In digital land, you may want to monitor the mic-input signal on module #9 BUT only do so if you notice a delay monitoring through the digital mixer and or recorder path. I will get into this subject in future articles).
- Bring module #7 (recorder track return) about half way up on the fader throw.
- Bring up the studio control room monitor level up to a normal listening level.
- Ask the guitarist to play the part for the song. While the guitarist is playing, slowly bring up the fader on module #9 (guitar mic fader source) to zero (unity gain). This level setting is typically around 3/4ths up on the fader throw - Look at the etching next to the fader to find the zero mark.
- Adjustments to Step 2 for analog/separate mixers: If you're using an analog mixer and recorder (hardly used these days) adjust the mic pre-amp trim level on the mixer to average zero dB on the recorder track meter for now.
- Adjustments to Step 2 for digital mixer/recorders: If you're using a digital recorder format, adjust the mic pre-amp trim level to -4 dB on the recorder track meter for now (-4 dB is safe in case the guitarist players louder when recording - the odds are good that will happen!) Always remember that going "into the red" (past zero) on a digital format meter will definitely "clip" the A to D converter (analog to digital converter) which is not advisable. Digital distortion sounds terrible! Of course, as John Lennon proved (re-read my first column here) there are no rules - so this is a good time to slam the level to see what digital distortion sounds like.
Regarding the adjustments to Step 2, if you are the guitarist and engineer, if the amp is in a separate room or closet, you will be monitoring over the control room speakers. If you have no guitar amp isolation, meaning the amp is in the same room as the board/recording deck/monitors, you will be using headphones to monitor. In any case, if you're going to be playing chords for the guitar part, play all the open strings when adjusting the level with your other hand. If you're going to be playing single notes for the part, simply play one string for now, such as the "D" or "G" string, and adjust the mixer level with the other hand.
Experiment with EQ settings on your mixer, whether it's a stand-alone mixer or a computer hard disk recorder/mixer. After EQing to taste, go back to step 8 or 9 (depending upon your recorder format). Make sure to have the guitarist play as loud as he or she will be playing for the song. If you are the guitarist and engineer, do yourself a favor and play as loud as you will play for the performance.
If you're using an analog recorder and you want to get a little "tape compression," it is acceptable to use a higher level than an average of zero dB (step 8 above). In this case, to set the level for tape compression (after setting the EQ, outboard compressor (if used), and possible other effects), you would need to put the guitar track in record and monitor it in "playback" mode (monitoring off the playback head). Bring up the level on mixer module #9 to taste. If mixer module #9 becomes maxed out and you want more level, use the line level trim pot. The VU meter for track #7 will be slamming way past +3 dB (+3 dB is the end of the meter range on most analog meters). Understand that there is a difference between tape compression and electronic distortion. We tend to like a little tape compression, but electronic distortion - which you get by pushing the machine too far, usually doesn't sound so good. To avoid ugly distortion in the mixer and tape machine electronics, back off on the level a little until it goes away. Note that you want to do this level setting after EQing since positive EQ adds level.
Note that when monitoring the guitar in "playback" mode there is a delay, so if the guitarist is not you and is wearing headphones, it may be best to take the guitar out of the headphones while doing the level settings. I know - I haven't gotten around to the headphone mix stuff yet, but I will do so in following articles.
If you're using a digital recorder (step 9 above), it's best to have the signal not go above -4 dB on the recorder track meter to play it safe. Always remember that digital distortion is simply awful! Yea, no rules as usual and just the opinion of the author.
If you don't think the guitar sound needs EQ, there's no reason to add any, BUT the only way you will find out is to experiment with EQ settings. So here we go.