Four years after her multi-platinum debut album, Me, Myself & Us, singer/songwriter Pascale Picard and her self-titled backing band return with their second effort, A Letter to No One. Produced by Jean-Francois Lemieux (Daniel Belanger, Robert Charlebois), its 14 songs show glimpses of her previous organic folk sound, as on the gently plucked acoustic ballads “If I Let You” and “The Right Rhyme (Cat’s Got My Tongue)” and the melancholic duet with Franco-Ontarian Damien Robitaille, “Nobody’s Here to Break Your Heart.” But elsewhere, Picard displays a newfound sense of invention, combining spiky angular riffs with strident military rhythms on the driving “The Gap”; adding a crunching dirty bassline to “Raw,” a track that recalls the dictionary swallowing angst-rock…