There are a few things you can do to keep your guitar in tune with a capo:
1. Use a high-quality capo. A high-quality capo will put less pressure on the strings and be less likely to cause them to go out of tune. 2. Place the capo correctly. Make sure that the capo is placed evenly on the neck and that it is not pressing down too hard on the strings. 3. Use heavier gauge strings. Heavier gauge strings have more tension, which makes them less likely to go out of tune with a capo. 4. Tune your guitar before you put on the capo. This will help to ensure that your guitar is in tune before you start playing. 5. Tune your guitar regularly while you are playing. This is especially important if you are playing in a hot or humid environment. 6. Be careful not to overtighten the capo. Overtightening the capo can put too much pressure on the strings and cause them to go out of tune. 7. Use a capo that is made of a soft material, such as rubber or felt. This will help to reduce the amount of pressure that is placed on the strings. 8. Place the capo as close to the fretboard as possible. This will help to reduce the amount of tension that is placed on the strings. 9. If you are using a floating bridge, adjust the bridge saddles so that the strings are slightly higher than normal. This will help to compensate for the loss of tension caused by the capo. 10. Tune your guitar frequently, especially if you are playing in a hot or humid environment.
Here are some additional tips that may help to keep your guitar in tune with a capo:
- Use a capo that has a locking mechanism. This will help to ensure that the capo stays in place and does not slip.
- If you are using a capo with a lever, make sure that the lever is not bent. A bent lever can cause the capo to put uneven pressure on the strings.
- If you are using a capo with spring tension, make sure that the springs are not too tight. Too much spring tension can cause the capo to put too much pressure on the strings.
- If you are playing a song that uses a lot of capo changes, you may want to consider using a capo that is made of a soft material, such as rubber or felt. This will help to reduce the amount of damage that is done to the strings.

