The Way of the Melody adopts some elements from the bard and combines it into a subclass to make a Monk caster that is able to hold itself up in a fight. While being able to support themselves or other party members with spells. 

Melodic Performer

Starting at 3rd level, you gain the ability to cast spells.

Cantrips: You Learn 3 cantrips: Three cantrips of your choice from the bard spell list. You learn another Bard cantrip of your choice at 10th level.

Spell Slots:  The Way of the Melody Spellcasting table shows how many spell slots you have to cast your spells of 1st level and higher. To cast one of these spells, you must expend a slot of the spell's level or higher. You regain all expended spell slots when you finish a long rest.

For example, if you know the 1st-level spell charm person and have a 1st-level and a 2nd-level spell slot available, you can cast charm person using either slot.

Spells known of 1st level or higher You know three 1st level from the bard spell list.

The Spells Known column of the (Arcane Trickster Spellcasting) table shows when you learn more spells of 1st level or higher. Each of these spells must be a bard spell of your choice and must be of a level for which you have spell slots. For instance, when you reach 7th level in this class, you can learn one new spell of 1st or 2nd level.

Whenever you gain a level in this class, you can replace one of the bard spells you know with another spell of your choice from the bard spell list. The new spell must be of a level for which you have spell slots, and it must be a bard spell.

Spellcasting ability. Charisma is your spellcasting ability for your spells, since you learn your spells through dedicated practice and you use your Charisma whenever a spell to your spellcasting ability. In addition, you use your charisma modifier when setting the saving throw DC for a spell you cast and when making an attack roll with one.

 

Spell save DC 8 + Proficiency + Charisma modifeir

Spell attack modifier Proficiency + Charisma modifier

Stride of the Melody

Starting at 3rd level, The monks of this tradition learn skills around the realm and even modify their weapons to be used in combat.

You learn tinkers tools and one additional skill and learn how to use one of the modified weapons as an instrument from the following list.

• Tierso (Club): a short wooden rod that is hollowed out to make a thudding sound when struck
• Geseji (dagger): A metal whistle type with different keys on the handle. Allows for whistle like sounds when moved at a fast speed.
• Woln (hand ax): the handle is made of brass with the ax head being adjustable. Vibrations blown into the handle allows for reverberation to produce sound.
• Creat (Javelin): a longer version of the Geseji, it has an overall lower pitch but functions the same way.
• Tish Brass(light hammer): the handle is made like a trumpet but the head of the hammer is made of hard steel material. 
• Prash Tuba(mace): much like the tuba, it has been modified for combat and made lighter.
• Upray (Quarterstaff): Long wooden pipe instrument much like an extremely long clarinet
• Avult Bow (Sickle): it is constructed like a harp that has a sharp blade on the bottom edge.
• Boxipipe (Spear): similar to a rain stick but it has a sharp point much like a normal spear.
• Anod: (Sling) An adjustable strap with pipes that use the air made from the rocks being thrown to make different sounds.
• Drieb (short sword) A flexible metal beam that comes with a bow made on similar metal that is taught when the bow is held up to the beam it makes music. Similar to a Viola.

The learned instrument can be used as a spellcasting focus and a weapon in combat. These instruments can be monk weapons. You can also use tinkers tools to create and repair these instruments. At the end of a long rest, you can create an instrument weapon by taking one of the available monk weapons and spending gold equal to the price of the weapon times 10. At each level thereafter, you can change out and use another instrument as your monk weapon.

As an additional cost to using an instrument as a weapon, if you roll a 1 on an attack roll the weapon breaks. A broken weapon can't be used as a spellcasting focus or a monk weapon, it needs to be repaired to be used again. At the end of a short or long rest, you can spend gold equal to the price of the weapon times 5 to buy the materials and replacement parts to bring the weapon back to effective use.

Melodic Impact

Starting at 6th level, Monks of the Melody can use their instruments to emit notes that deal damage. Whenever you use the attack action you can use your attacks to make a ranged weapon attack with your instrument. The damage does damage equal to your martial arts damage die. These ranged attacks can go up to 60 feet and deal thunder damage.

Martial Rhythms

At 11th level, After casting a spell, you can spend 3 Ki Points to make an attack action as a bonus action. You can only do this a number of times equal to your wisdom mod. You regain these uses after a long rest.

Spell Bending

Beginning at 17th level, Using the Deflect Missiles feature, you can use this to deflect spells that make an attack roll that hit you. Like Deflect missiles, you can reduce the damage by 1d10 + your Dexterity modifier + your monk level. Additionally, you can spend 1 Ki point to add an additional 1d10  to the Spell Bending roll up to a maximum of the spell slot you know.

For example, a monk of level 10 knows up to 2nd level spell slots. When hit with a spell that makes an attack roll the monk can use its reaction to reduce the damage by 1d10 + Dexterity Modifier + Monk level and then can spend up to 2 Ki points to add 1d10 per Ki point to the total of the damage reduced. For a total of 3d10 + Dexterity Modifier + Monk level by spending their reaction and 2 Ki points.