At the time of the release of Sound of My Heart, Kemmler felt indifferent to the musical direction he had adopted, including his collaborative work with producer Michael Cretu.

He subsequently travelled, read Hermann Hesse, studied King Ludwig II of Bavaria and listened to the works of Richard Wagner.

[5] When work on his new music exceeded the budget provided by Polydor, Kemmler spent over 1 million Deutsche Mark of his own money on the recording of Hubert Kah.

"[2] Many of the album's songs relate to Kemmler's personal struggles, including "Sailing (Away from Me)", "I Came to You (Oriental Moon)" and "Fortress Around My Heart".

"I Came to You (Oriental Moon)" contains prayer chants recorded by Kemmler during his time in Oman and the United Arab Emirates.

[2] Kemmler also recorded at Hohenschwangau Castle in order the feature Wagner's own piano, played by Andi Slavik [de], on the album, owing to its "slightly out of tune sound that the composers of the romantic period also used and loved".

[10] Upon its release, Der Spiegel described the album as "deserving of all respect", with Kemmler singing of "fear, anger [and] isolation".