In this track I have used fantastic Pianobook VST instrument in the intro as well as some other parts of the song:
'Low whistle' by Plug-in Play
This old low whistle (tenor whistle)was purchased from an old market shop in the middle of the Irish Gaeltacht in Spideal, Co. Galway, and it’s been played on stages all around Ireland.

To find out more about the Pianobook project, how you can get involved and to download these plugins and many more free instruments, please visit:
www.pianobook.co.uk 

For further information, download and updates visit:
https://www.pianobook.co.uk/packs/low-whistle/ 

If you would like to listen the whole song please visit: 
https://www.youtube.com/watch?v=VT2quCCl0Xg

Ripple (Pianobook: Low Whistle), song part

Spiral Drop is a Croatian modern progressive rock/metal band formed in 2002 as one-man project by Robert Trpin after the original group named Spiral Wave broke up the same year just before entering the studio for their first demo. Most of the songs that were created during the Spiral wave sessions ended on the Spiral Drop demo album 'Ahead'.

Spiral Wave was the band formed in early 2000 by ex-Concrete band members: Zoran Basic (Vocals), Robert Trpin (guitars, vocals), Josko Putilli (guitars) and Ivica Djanovic (drums) after Marjan Desin (Beyond the Oblivion, F.E.B.R.A.) left the band. At the end of year 2000, Emir Mujdzic (ex-Puppy what's your name) joins the band on bass guitar. The band’s sound was influenced mostly by bands like Disturbed, From Zero, Tool, Incubus, 311, Helmet, Deftones, Snot, Nothingface, Slipknot, System of a down, Creed, Spineshank, Metallica, Faith no more, Rage against the machine, Foo fighters, Alice in chains, Soundgarden and many others.

In period 2003-2006 Spiral drop has changed the sound combining more electronic elements together with exploring some different progressive rock/metal areas. In 2008 second album 'Paragon' was released with 15 new songs. On the second album there were several guests participating on the new songs including and 3 cover songs. Vocals on song 'Empyrian' and on the coversong 'Time after time' (Cyndi Lauper) are recorded by Matej Trpin (ex-Nitrotaste &amp; Beyond the oblivion). Katarina Pavlicevic has landed her voice on 'Empyrian' &amp; 'Pigeon song' (also cover of one traditional songcalled 'Golubice bila'). As a special appearance on bass guitar Emir Mujdzic is back on track 'Time after time'. Anica Susic on vocals and Vedran Levi on bass guitar are guests covering Despina Vandi 'Gia'.

In 2012 SDH Records has issued a re-mastered edition of the original demo named 'Ahead' with some new 'old' songs as a 10 years anniversary album with the completely new recorded sound.

Discography:
Ahead (2003)
Paragon (2008)
Three fours (2017)
Hold the line (2022)