The description for the feat Metamagic Song in Races of Stone states (emphasis mine):
When you spontaneously cast an arcane spell that is enhanced by a metamagic feat, you can spend a number of uses of your bardic music ability equal to the number of extra levels that the metamagic feat imposes on the spell rather than raising the spell's effective level. Applying metamagic spontaneously using this method increases the casting time of the spell normally. You cannot use the Metamagic Song feat to add metamagic feats that would make the spell's effective level higher than the highest level of spell that you can cast normally.
Does the highlighted text mean that you can’t Metamagic song away the cost of a quickened spell?