Did you know that you can listen to many of your favourite podcasts first on BBC Sounds?

Like Desert Island Discs, where you can hear castaways like Cher, Gareth Southgate and Nick Cave,

and enjoy longer versions of the music they've picked.

Good things come to those who don't wait.

Listen to your favourite podcasts first on BBC Sounds.

The Scotland Outdoors podcast from BBC Radio Scotland. Hello and thanks for downloading this podcast. I'm Mark Stephen.

With me today, back from my sailing trip off the west coast of Scotland, Mr. Ewan McElraith.

In this edition, we're going to be taking a sound journey.

Our guest today is umpteen things, a field recordist, a bassist, a sound engineer, and as he describes himself, and I may nick this, Sonic Explorer.

He's based in the north of England. Welcome, David De La Hay.

Hello from Durham.

You got in touch with us to tell us about some of the work you've been doing with marine

conservation and sound, and on paper it sounded fabulous.

It's been even better when we've actually got to hear it.

Before we actually get to that, tell us about where you are just now.

What you do for a day job?

I work as a musician, but I also work as a music technician at Newcastle University,

where I support a various creative project and work in the recording studios there,

supporting student projects and the likes.

We've got some fantastic recordings that you've sent us.

I mean, it is wonderful, wonderful stuff.

But before we throw herself into that,

...