This week's show is now available via the BBC iPlayer. Please visit the link any time between now and the start of the next programme.

If there is one indubitable fact about compiling a radio show, it is this: no matter how much you try to be get everything tied down a few days in advance, someone's going to send you something at the last minute that will splatter those plans all over the place. Like a helicopter blade meeting a watermelon giant.

So, I was all proud and rather relaxed cooking my own Father's Day breakfast (bitter, me?), because the running order was sorted, I had some Godlike tones for you. Then, the inevitable trickle: things started arriving in my inbox that couldn't be ignored. So, like they were cub scouts trying to cram themselves into a Mini for Record Breakers, I heaved the new arrivals in with my ass against the door and promised myself not to talk too much in between.

Then the Cardiff Singer of the World competition overran by three minutes. This seemingly innocuous occurrence exerted so much pressure on the musical content of the show that it almost - almost - collapsed into a singularity of sound, a sonic black hole that would have sucked every instrument and musical mind in Wales into its utterly opaque heart, never to be heard again. That is what would have happened. It is scientific fact.

Fortunately I managed to avoid this dreadful outcome by talking a bit over the introductions and endings of a few of the tracks. It was a close call, though.

Suffice to say things are a bit squished. Well worth it when you consider what will file past your ears should you decide to visit us via the iPlayer: a live set from Llangollen & Chester's wonderful Shy & the Fight; debut plays for Tabularasa, Organ Grinder, Electric Wedding and The Lost Rivers; superb new tracks from Culprit 1, Vanguard, Andy Hickie and the Merry Maidens and many more... Alan Holmes plays us some Offspring (no, not *that* Offspring); Lara Catrin translates some Meic Stevens and Ben Hayes bridges soul and disco with an instrumental version of something from The Who.

Houdini Dax provides us with our Album of the Week (You Belong to Dax Darling - available now on See Monkey Do Monkey records). Their first brush with this show was in January 2009 when they were still in school, but clearly remarkable talents. The album is testament to the fruition of that talent. It's exuberant, melodic, fearless, as thrilling and unexpected as a crateful of Gandalf's fireworks. They sold out Clwb Ifor Bach in Cardiff on Friday night at their album launch, which is no mean feat. Exciting times ahead for them.

Further increase our musical density by sending demos/new releases/gig info/rum bumf to themysterytour@gmail.comBBC Introducing Uploader).

Loftily offered advice on submitting music to the show is available here:

• Submitting Music to the Show Dos & Don'ts #1
• Submitting Music to the Show Dos & Don'ts #2
• Submitting Music to the Show Dos & Don'ts #3
• Submitting Music to the Show Dos & Don'ts #4

Please feel free to share the iPlayer link with all and sundry. Some of these sounds will make people feel better. That's some dang powerful magic, is that.

Yours in sound,

Adam

HOUDINI DAX - 'Green Gate'
Cardiff

TIM & SAM'S TIM & THE SAM BAND WITH TIM & SAM - 'Summer Solstice'
Ewloe

AMONG BROTHERS - 'My Head Is A Vessel'
Cardiff/Aberdare

FRIENDS ELECTRIC - 'Fireworks'
Neath

VANGUARD - 'Long Beach'
Pembrokeshire

JOY FORMIDABLE, THE - 'A Heavy Abacus'
Mold

GROOVE ROBBERS FEATURING DJ SHADOW - 'Hardcore ( Instrumental ) Hip Hop'
San Francisco

METABEATS - 'The Snap Featuring Mudmowth, Rtkal & Ruffstylz ( Radio Edit )'
Cardiff

LITTLE ARROW - 'Boat'
Cardiff

SWEET BABOO - 'The Day I Lost My Voice'
Bangor/Cardiff

JODIE - MARIE - 'I Got You'
Narberth, Pembrokeshire

TINY SKITZ - 'Grime Is The One'
Newport

EVM (EVERMEAN) - 'Stay ( Featuring Amy Wilson )'
Mold

SAM AIREY - 'The Blackout ( Radio Edit )'
Anglesey

SHY AND THE FIGHT - 'Dream ( Live )'
Chester/Llangollen

SHY AND THE FIGHT - 'Hear The Sea Speaks In Whispers ( Live )'
Chester/Llangollen

SHY AND THE FIGHT - 'Living ( Live )'
Chester/Llangollen

QUIET NOISE - 'Paper Cuts'
Pembrokeshire

JEN JENIRO - 'Mewn Encyd'
Llanrwst

ALAN HOLMES - 'Spoken Contribution'
Bangor

OFFSPRING - 'There You Are'
Bangor

HOLY COVES - 'All Around You'
Holyhead

TABULARASA - 'Valley Run'
Swansea

HOUDINI DAX - 'O. L. L.'
Cardiff

TELEFAIR - 'Birds & Trees'
Rhyl

TRWBADOR - 'Hit The Bricks ( Radio Edit )'
Camarthen/Cardiff

PULCO - 'Beanbags'
Bangor

PHRAZER - 'Angry Parrot'
Newport

ORGAN GRINDER - 'Obsession'
Cardiff

RHEINALLT H. ROWLANDS - 'Merch O Gaerdydd'
Llanfair P.g.

ELECTRIC WEDDING - 'Lady Neptune'
Llanfairfechan

CULPRIT 1 - 'Grains Of Light'
Newport

CAMERA - 'Happiness'
Wrexham

CUBA CUBA - 'Golden Grounds ( Bbc Introducing With Jen Long Session Track )'
Cardiff

TOWN - 'Teenage Sky'
Newport

NO THEE NO ESS - 'Let's Get Away'
Swansea/Cardiff

ANDY HICKIE & THE MERRY MAIDENS - 'I'd Rather Be Ramblin''
Brynford

LARA CATRIN - 'Spoken Contribution'
Bangor/Cardiff

MEIC STEVENS - 'Merch O'r Ffatri Wlân'
Solva

SKINDRED - 'Cut Dem'
Newport

BEN HAYES - 'Spoken Contribution'
Ruthin

ASSEMBLED MULTITUDE, THE - 'Overture From Tommy'
Philadelphia

LOST RIVERS, THE - 'Death Of Eve'
Baden-württemberg/Welsh Label