Music is haraam.
Below is an extract from the excellent Islam Q & A
website
http://islamqa.com/en/ref/5000
http://islamqa.com/en/ref/43736
The Messenger of Allaah (peace and blessings of Allaah be upon
him) said:
“Among my ummah there will certainly be people who permit
zinaa, silk, alcohol and musical instruments…” (Narrated by
al-Bukhaari ta’leeqan, no. 5590; narrated as mawsool by
al-Tabaraani and al-Bayhaqi. See al-Silsilah al-Saheehah by
al-Albaani, 91).
This hadeeth indicates in two ways that musical instruments and
enjoyment of listening to music are haraam. The first is the fact
that the Prophet (peace and blessings of Allaah be upon him) said:
“[they] permit” which clearly indicates that the things mentioned,
including musical instruments, are haraam according to sharee’ah,
but those people will permit them. The second is the fact that
musical instruments are mentioned alongside things which are
definitely known to be haraam, i.e., zinaa and alcohol: if they
(musical instruments) were not haraam, why would they be mentioned
alongside these things? (adapted from al-Silsilah al-Saheehah by
al-Albaani, 1/140-141)
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Allaah (SWT) says (interpretation of the meaning):
“And of mankind is he who purchases idle talks (i.e. music,
singing) to mislead (men) from the path of Allaah without
knowledge, and takes it (the path of Allaah, or the Verses of the
Qur’aan) by way of mockery. For such there will be a humiliating
torment (in the Hell‑fire)”
[Luqmaan 31:6]
The majority of mufassireen say that what is meant by
Lahwa al-hadeeth (“idle talks”) in this verse is singing. Another
group says that it is every sound of entertainment, which includes
flutes, stringed instruments and so on. All of these mislead men
from the path of Allaah and cause misguidance. It is proven that
Ibn Mas’ood (may Allaah be pleased with him), the great Sahaabi who
was one of the scholars of the Sahaabah (may Allaah be pleased with
them) said, commenting on this verse: “By Allaah, this refers to
singing.” And he said: “It causes hypocrisy to grow in the heart as
water causes herbs to grow.”
And there are many ahaadeeth which point to the prohibition of
singing and musical instruments and indicate that they are a means
which leads to great evil and bad consequences. The great scholar
Ibn al-Qayyim (may Allaah be pleased with him) discussed the
rulings on singing and musical instruments in great detail in his
book.