I suggest you check the noise ordinance law where you live before assuming cops wont do anything about it until after 10 or 11pm. The noise ordinance law varies from state to state.
Here is the noise ordinance law where I live:
21-13 (1) General Prohibitions:
It shall be unlawful for any person to make or cause to be made any loud or unreasonable noise. Noise shall be deemed to be unreasonable when it disturbs, injures, or endangers the peace or health of another or when it endangers the health, safety, or welfare of the community. Any such noise sheall be considered to be a noise disturbance and a public nuisance.
21-13 (2) Express Prohibitions:
The following acts, which enumeration shall not be deemed to be exclusive, are declared to be a noise disturbance:
A. Radios, television sets, musical instruments, phonographs and similar devices.
The operation or permitting the use or operation of any musical instrument, radio, television, phonograph, or other device for the production or reproduction of sound in such a manner as to disturb the peace, quiet, or comfort, of the public or in such a manner as to be audible through walls between units within the range of the same building, from another property or the street.
B. Parties and other social events.
It shall be unlawful for any person in charge of a party or other social event to allow that party or event to produce noise in a loud or offensive manner such that the noise interferes with the peace or health of members of the public or is audible through walls between units within the same building, from another property or from the street. A person shall be deemed to be in charge of a party or social event when that event occurs on private property and the person is present at the event and resides on the premises involved or is a person who lives in or on the premises involved and who has authorized the use of the premises for such event.
As you can plainly see, there is no time of day mentioned where the police will not enforce these noise violations.