Three business days:  $1.50 per recorded minute
Next business day:  $2.00 per recorded minute 
Same business day:  $3.00 per recorded minute

Every project has a variety of factors that may affect pricing. So send me an email with a description of your material and I'll let you know if it fits within the standard rate structure. If you have a sample file that you'd like to attach or link to, then please feel free. A more accurate determination can be made if I take a quick listen to your material.