Is music really haram? I'm not talking about the Rihannas "Wild Thoughts" kind of music, more of peaceful piano, flute, violin, ancient music. The kind of music that doesn't give off sexual vibe and stuff, but the music that adheres peace, you know?
[Below is a quick survey of opinions on this matter gleaned from Arabic-language sources. I may eventually write out a full essay on this, although it is not one of my topics of interest, since the permissibility of music is such an obvious thing that it is almost not worth talking about.]
It is mentioned in Sahih al-Bukhari and Muslim that the Prophet tolerated musical instruments played by some girls and did not prohibit them. There is also no evidence from hadith that the Prophet ever issued a statement prohibiting musical instruments.
Many Islamic scholars reject the idea that music is prohibited. The scholar Ibn Hazm (d. 1064 CE, creator of the “fifth” school of Islamic jurisprudence) considers every hadith that has been used to make music haram fabricated, and considers listening to music the same as taking joy from a nature walk.
The scholar al-Shashi (d. 976 CE) says that Imam Malik permitted music. Imam al-Shafi`i says that there is no clear evidence to prohibit music.
The scholar al-Mawardi (d. 1058 CE) says that Abu Hanifah, Imam Malik and al-Shafi`i did not prohibit music.
The respected theologians Abu Hamid al-Ghazali, Ibn Daqeeq, Izz al-Din ibn Abd al-Salam (famous Shafi`ite scholar, known as the Sultan of Scholars in his time, d. 1262 CE), Abdul Ghani al-Nablusi, Ibn Qutaybah, al-Maqdisi, al-Dhahabi, Abu Talib al-Makki, Ibn al-Arabi al-Maliki and Imam al-Shawkani consider music permissible.
Among modern scholars who reject the prohibition on music are the Azhar scholars Muhammad al-Ghazali and Yusuf al-Qaradhawi, Hasan al-Attar, Mahmud Shaltoot, Ali al-Tantawi and Muhammad Rashid Radha.
For a very detailed discussion of the relevant evidence on both sides of the debate, see the following (Arabic) article:
Certain types of music can be considered forbidden due to things associated with the music, but that is a different matter.