Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE tracklists ( albumid number, position number, songid number )
TABLE: CREATE TABLE instruments ( songid number, bandmateid number, instrument text )
TABLE: CREATE TABLE performance ( songid number, bandmate number, stageposition text )
TABLE: CREATE TABLE vocals ( songid number, bandmate number, type text )
TABLE: CREATE TABLE band ( id number, firstname text, lastname text )
TABLE: CREATE TABLE albums ( aid number, title text, year number, label text, type text )
TABLE: CREATE TABLE songs ( songid number, title text )

### Question ###
Find all the vocal types.

### Accurate SQL ###

SELECT DISTINCT type FROM vocals