You do not need a record label. To sell music on your own you ideally need your own website and to market your product which can cost a lot of money depending on how far you want to expand. Unfortunately in this modern day in age you will only maybe get (if your lucky) $1 dollar per song which will not usually cover costs for your marketing. However if you to sell merchandise as well, where fans can buy, say a t-shirt for $35 which only costs $5 to make, you will earn a profit of $30 which will help pay for your marketing and in turn produce more sales of your music. Hope this helps.
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