Pianist and singer Joe Stilgoe helps Cerys Matthews and Jeffrey Boakye compile the next five tracks for the growing playlist, with musical connections taking us from a controversial singing style to the Austrian Alps.

DJ and BBC Asian Network presenter Sonny Ji and voice coaches Dr Gillyanne Kayes and Jeremy Fisher provide insights into the techniques and background to individual tracks.

Presenters Cerys Matthews and Jeffrey Boakye

Producer Jerome Weatherald

The five tracks added to this week's playlist:

It Don't Mean a Thing by The Boswell Sisters

She Taught Me How to Yodel by Frank IfieldEdelweiss by Bill LeePiya Tu Ab To Aaja by Asha BhosleLose My Breath by Destiny's Child

Other music in this episode:

Sandstorm by Darude

I'm Forever Blowing Bubbles by Doris DayRum and Coca-Cola by The Andrews SistersChattanooga Choo Choo by The Andrews SistersThroat singing by Karin and Kathy KettlerArizona Yodeler by The DeZurik SistersYelli by the Baka Forest People in the Cameroon rain forestDaddy and Home by Jimmie RodgersA Yodeling Hobo by Gene AutryYodelling Mozart by Mary SchneiderZombie by The CranberriesGood Sign, Bad Sign by Monty Norman Crazy In Love by Beyoncé (Homecoming Live)Let's Go Blue by the University of Michigan Marching Band