What are the stories behind Canada's most iconic sounds? What sounds are uniquely Canadian? What world-famous sounds have Canadians invented? What Canadian sounds have changed your life?

Those are just some of the questions we'll try to answer on the CanadaSound Podcast with Grant Lawrence.

We're asking Canadians in every corner of this country to submit their favourite Canadian sounds via video, audio or text, and tell us the story behind that sound. This podcast is just one part of the CanadaSound project. Find out more here.

On the third episode of this podcast, you'll hear:

• The story behind one of Vancouver's loudest but most misunderstood sounds: the Heritage Horns, known to many Vancouverites simply as the noon horn. Did you know the horns play a tune, and not just any tune? Grant Lawrence gets very up close and personal with this famous West Coast daily blast.
• A CanadaSound song called "Banks of the Seaway" by veteran singer-songwriter David Francey, using sounds from his beloved St. Lawrence Seaway.
• The CanadaSound Mix Zone with Radio 2 Drive host Rich Terfry, who has taken more of your submitted sounds and turned them into a perfect summer slice of hip-hop in tribute to the "symphony of cottage country."

Download the CanadaSound podcast here, or listen to it streaming below.

Check out Grant's video with the Heritage Horns.

Has a Canadian sound changed your life? What is your favourite Canadian sound? Submit it here.

CBC Music is pleased to support CanadaSound, imagined by cleansheet communications, with partners the Junos, SOCAN, Musicounts, Canadian Heritage, IcI musique, and Adisque.